The founder of this present Buddhadharma, Guru Shakyamuni Buddha, said in the precious sutra teaching, the King of Concentration,
The three worlds are impermanent like autumn clouds. Look at the dance of the sentient beings, their birth and death is the same as this. How the sentient beings’ life finishes, how the sentient beings’ life goes, is like lightning in the sky.
He says there is the world of form, the world of formless and the world of the senses, so the whole of samsara is divided into three worlds.
All these three worlds are impermanent, they do not last and even in a single second they change. They decay in each second, because they are impermanent, just like autumn clouds. The sutra says “autumn” because in autumn time there are more clouds and generally these clouds are very quick to change. In just one second or one minute the clouds are there, then after one second or one minute they are not there. They change into another shape or they disappear. The clouds change so fast, even in a split second. So the three samsaric worlds are like the autumn clouds. “Look at the dance of the sentient beings, their death and rebirth are the same as this.” Guru Shakyamuni Buddha is saying that all the three worlds are impermanent, because they are like clouds. He is saying look at the dance of all the sentient beings, the circle of the death and rebirth. Nothing lasts, sentient beings die then they are again reborn, again they die and again they are reborn, every second like this. That’s how the three worlds quickly decay and change, like clouds.
The sutra says, “The sentient beings’ life finishes so quickly, like lightning in the sky.” Lightning in the sky is there for just one second, but after that second, it doesn’t exist. It is there just for a short time, just for one second, but in the next second, it doesn’t exist. Normally, we believe we are going to live for a long time and we think, “I’m not going to die soon.” It doesn’t matter how much we believe this, the nature of our life is that it finishes and we quickly reach death, just as lightning finishes so quickly, in such short period. The length of our life is so short, like the length of time of lightning in the sky. Our life is very, very short.
What Guru Shakyamuni Buddha said is true. Since we were born until now, all the past things—our past history, our past life stories, everything that we did, everywhere we stayed, no matter how long our story was, no matter how much we did since we were born until now—the whole thing finishes quickly just like last night’s dream. Everything we did from the time we were born until now is quickly finished in such a short time, just like lightning of the sky—whether we suffered, whether we enjoyed pleasure, no matter how much we did. If we check up on our own experience like this, it is very true, it is exactly the same, it is absolutely true. There’s no exaggeration in what Guru Shakyamuni Buddha said in his teaching. It is exactly the same, according to the nature of our life. We received this perfect human rebirth, but it does not last and we have it just for a second.
For instance, a person can’t see anything when it is completely dark at nighttime, even if he’s reaches a place where there are jewels or diamonds that he can pick up. He can’t see at night when it is completely dark. The person wants to steal jewels at night when it’s completely dark, because he can’t steal them during the day. So, he thinks if he is careful, he can try to see the jewels and try to get them while there’s lightning. If he’s not careful, if he doesn’t try to pick up these diamonds or precious jewels, then after the lightning is finished, he can’t find them. He can’t recognize the jewels even if he’s close to them, because he can’t see them in the dark.
So like this, we have received the precious human rebirth just for a short time, like lightning. In the short length of time we have this precious human rebirth before it passes away like lightning, we have to be careful and put all our effort, and by recognizing this, we have to try to get the essence, which is to receive enlightenment for the benefit of other sentient beings. For example, having received the precious human rebirth is like lightning, and taking the essence is like picking up a diamond. Taking the essence of receiving enlightenment and trying to receive enlightenment for the sake of other sentient beings is like picking up a precious diamond.
To receive enlightenment, it is necessary to listen, to understand and to meditate on the teachings of the graduated path to enlightenment. In order to listen to the teachings, it is necessary to cultivate a pure motivation and to think, “For the benefit of all mother sentient beings, I must receive enlightenment right away, as quickly as possible. Therefore, I’m going to listen to the profound teaching on the graduated path to enlightenment.”
We are listening to the Mahayana teaching which leads to enlightenment. It is well expounded by the great philosophers Nagarjuna and Asanga. This profound teaching is the essence of the infinite knowledge of the great pandit Atisha and the great Dharma King, Lama Tsongkhapa. It contains all the 84,000 teachings from Guru Shakyamuni Buddha. All these teachings are set up for the gradual practice of one person achieving enlightenment. This is how all the past, present and future buddhas have received enlightenment.