My very dear, most precious, most kind, wish-fulfilling one,
Thank you a billion, million, zillion times for following my advice and doing a 200,000-Vajrasattva retreat and for now doing OM MANI PADME HUM. I'm sure you must be doing it with a bodhicitta motivation to free sentient beings— numberless hell beings, hungry ghosts, animals, humans, suras and asuras—from oceans of samsaric sufferings  and bring them to the state of omniscience, sang gyä, the elimination of all the obscurations and completion of all the realizations. In that case, with each OM MANI PADME HUM and Vajrasattva mantra, you are purifying the obscurations created over beginningless rebirths and collecting more than skies of merit. 

Lama Atisha said in the Lamp for the Path to Enlightenment, quoting the Sutra Requested by Pachin [verses 16-17]:

“If somebody offers buddha fields, buddha worlds, equaling the sand grains of the river Ganga—here, ‘equaling the number of sand grains of the river Ganga,’ when it talks about the benefits of bodhicitta, ‘the river Ganga’ doesn't mean the Indian river Ganga, it means the Pacific Ocean, the sand grains of the Pacific Ocean—filled up with the seven different jewels like gold, diamonds, sapphires, etc., and offers that to the buddhas, but then somebody puts the palms together at the heart and simply generates bodhicitta, this offering is greater and it has no limit.”

What it is saying is, for example, if you offer buddha worlds filled with the seven different jewels equal to the number of sand grains in your hand, even that merit is beyond our understanding. We can't figure that merit out. That is unbelievable, unbelievable, most unbelievable merit. Now, here, it is talking about buddha worlds equaling the number of sand grains of the Pacific Ocean filled up with seven different jewels, so there’s no way we can understand the merit. It's amazing, amazing, amazing, amazing, amazing.

Now, somebody simply puts their hands at the heart and thinks, "May I achieve full enlightenment in order to free all the sentient beings from the oceans of samsaric suffering and bring them to a state of omniscience.” This creates more than skies of merit—much, much, much greater than the previous example. The merit from the previous example becomes very small by comparison, even though it's beyond our conception. 

Therefore you have so much to rejoice about this life. Thank you so much.

With much love and prayers...