My most dear one,
Yes, this is a very difficult thing to do. An action like this can become Dharma, but for us ordinary beings, it is extremely difficult for it to become anything other than negative karma.
When you explained this to me, it reminded me of the kindness of others, due the medicines we take that heal sickness for human beings. So many scientists and doctors have conducted these experiments on animals and in this way, they have discovered medicines that can help us. It reminds me of the suffering of so many sentient beings—animals first and then second, the human beings who conduct the experiments.
Of course, if someone has strong bodhicitta, then it can be different. Otherwise, the person doing the experiments is creating negative karma and they will then have to suffer in the lower realms for eons and eons until the negative karma is finished. If the karma is not finished, they have to suffer again, on and on. The suffering is inconceivable. If it was to manifest in material size, it would be almost as if there was no empty space left; it would all be filled with unbelievable suffering.
Because we don’t have omniscience and we don’t have even ordinary clairvoyance, we can’t understand the unbelievable suffering that we will have to experience by creating negative karma. If we knew and understood this, then it would be hard to create that negative karma.
Buddha gave 84,000 teachings, which come in the three baskets. There are the teachings of the Hinayana and the teachings of Mahayana, which has two parts, Mahayana sutra and Mahayana tantra.
In the Hinayana teachings there is no permission to do the three negative actions of the body (killing, stealing, sexual misconduct) or the four negative actions of speech (telling lies, gossip, harsh speech and divisive speech). These seven negative actions are not permitted in the Hinayana tradition, because they cannot become virtue.
In the Mahayana, these actions are permitted if they are done with the motivation of bodhicitta, taking responsibility to free the numberless sentient beings from the oceans of samsaric sufferings and bring them to enlightenment. We take that responsibility on ourselves and generate bodhicitta in order to achieve enlightenment for them. When this realization arises effortlessly, we feel it naturally, day and night, all the time. When we feel this, there is no thought of cherishing the I, even for one second. It does not arise, even for a second. There is no action done for the self-cherishing thought.
Only then in Mahayana can the three negative actions of the body and the four negative actions of the speech be done, but they must be done with bodhicitta. We must have unbearable bodhicitta, great compassion for sentient beings. Only then are these seven negative actions permitted and become virtue, so we are allowed to do them.
That’s also why in tantra, when we benefit sentient beings, there are various ways to benefit, such as pacifying actions. We can pacify negative karma and obscurations, such as sickness, spirit harm, etc. Then there are increasing actions, for example, increasing wisdom, increasing realizations, increasing long life, wealth and so forth. There is also controlling action, which means having control over the sentient beings, controlling their needs, controlling sentient beings in order to protect them, to bring them to enlightenment. It is only for this reason, for us to practice Dharma for sentient beings. We can achieve controlling power for the sentient beings and their needs in order to benefit others and the teachings of Buddha.
There are also wrathful actions, but you need to be qualified to do these. It is best if you have realized bodhicitta, great compassion. You would only do wrathful actions if the other three types of action have not worked. Wrathful action is only done if there are evil beings harming sentient beings and the teachings of the Buddha, so then with strong bodhicitta, compassion, using tantric practice, divine pride and clarity of the deity, you do wrathful actions, such as hooking the evil beings’ consciousness in the torma (dough made in the shape of a human being). The consciousness is hooked there and then burned in the fire. From there you bring the consciousness up and shoot it into the pure land. But you must have those powers and those qualities to do wrathful actions towards those who harm many sentient beings and the Buddha’s teachings.
In one of his past lives, the Buddha was a bodhisattva captain. He was sailing a boat with five hundred traders on it. On the boat there was one black man with a short body and a spear who was planning to kill all the others. The bodhisattva captain knew that and felt unbearable compassion. He thought that instead of that man having to be born in hell, he would choose to be born in hell and suffer instead of that man. So, with unbearable compassion he killed that man. The action didn’t become negative karma; it became positive karma, it became the cause of enlightenment, because it was done with unbearable, strong compassion, with bodhicitta. The result was happiness. He became free from samsara 100,000 eons sooner, and it made him so much closer to enlightenment.
So it is only in Mahayana that these kinds of negative actions can become the cause of enlightenment, but only if they are done with strong bodhicitta, the most unbearable compassion. The actions are done with that bodhicitta, with the mind wishing to be reborn in hell oneself, in order to save one sentient being from having to be reborn in the hell realms and having to suffer there for a long time. Instead of that, we choose to be reborn in hell and to suffer there for a long time, even for eons.
For a bodhisattva, that is like drinking nectar. A bodhisattva feels incredible happiness and they are most happy, like a swan in the hot sun entering the swimming pool—they feel so happy.
Then even if we can achieve liberation from samsara, if we achieve nirvana forever, becoming free from the oceans of suffering forever, achieving the blissful state of peace for ourselves, it looks like that is the worst thing. I say it is like toilet paper that is used to clean kaka; something that we throw away immediately. The bodhicitta attitude means that.
Therefore, those seven actions in Hinayana, without depending on bodhicitta they are always regarded as negative, but in Mahayana, if they are done with bodhicitta, they can become the cause of enlightenment for sentient beings.
Anyway, since you have already done these actions, you have done the experiments on animals, then you need to do something to purify your own negative karma. But not only that, the most important thing is to do something for all those animals—not only the mice and rats and so forth that you experimented on, who suffered unbelievably and died, but also all the animals in the world, all the others that scientists and doctors experiment on, those who undergo the most unbelievable, unbelievable suffering in order to make the medicines or cosmetics or for whatever reason.
My suggestion regarding the animals you have already harmed or killed is that you need to make a Vajrasattva statue.
Also, recite OM MANI PADME HUM every day, as much as possible. Recite this mantra totally with bodhicitta, dedicating for all those animals that you did experiments on and for all the other animals who have had experiments done on them. So, dedicate for all those numberless beings.
It is also possible that in past lives we were like these animals, the mice and so forth that were experimented on by others numberless times. We have been like that ourselves, going through that, and now, due to another good karma, we have temporarily been born as a human being. It is almost like good luck this time, that it turned out like this. Of course, it is not forever. It is just for a short time, like last night’s dream. For example, it's like the people and animals that fall down from a mountain and briefly land on some flat place. They stop for a very short time, then they continue to fall down. Or like a prisoner who is allowed outside for one hour to see their family then has to go back to prison. Having this human rebirth right now is like that.
Recite the OM MANI PADME HUM mantras for all the animals who have died already or suffered so much due to the experiments done by other scientists, doctors and students. Dedicate for every one of them. Then dedicate for all sentient beings—numberless hell beings, numberless hungry ghosts, numberless animals, numberless human beings, numberless suras, numberless asuras and numberless intermediate state beings—for them all to be free from samsara as quickly as possible and to achieve enlightenment as quickly as possible, to achieve Chenrezig, the Compassionate Buddha’s enlightenment. And for you also to achieve enlightenment. Then recite OM MANI PADME HUM as much as possible.
It is also good to do nyung nä practice, which is two or three days’ retreat on Chenrezig Buddha. This practice is unbelievably powerful. So do nyung näs dedicated for all the sentient beings from who we receive all our past, present and future happiness. This is where the numberless Buddha, Dharma and Sangha come from, to whom we go for refuge all the time. So, dedicate to all sentient beings, who are most precious, most dear, most kind, wish-fulfilling to us. Then dedicate for all the animals that the scientists, students and doctors experiment on, and in particular dedicate for all the animals you have experimented on, so do it for them.
It’s very important for your actions to become virtue, to become Dharma, so eating, walking, sleeping, doing your job, for all these actions to become Dharma as much as possible, not only prayer or meditation. That depends on having a good heart not only toward human beings but even to insects, to all the six-realm sentient beings. We need to have a good heart and to help others as much as we can, including ants and insects, to not harm them at all. Even though you did those experiments, generally do not harm other sentient beings; make it as less as possible, so that’s what I can say.
It would be good if you can read lamrim teachings. Especially read the parts on bodhicitta, to understand and feel more bodhicitta, to have an understanding that samsara is in the nature of suffering. You have to see your own suffering clearly, deeper, then you can feel great compassion to others, by seeing how others are suffering in samsara.
What I can say is only in regard to the past actions that you have done, but the present and future actions I cannot say; it is difficult for me to say. What I can advise on is the past actions you have done and how to purify that karma.
Of course, it’s not only you—there are numberless people in the world who have to do things like this in order to get a degree or to do their job, in order to qualify for a job and so forth, and of course, sometimes the result can help human beings with medicines and so forth.
Anyway, this is my advice. As much as possible, please live your life with bodhicitta motivation in every action you do.
With much love and prayers ...