Toward the end of [Chapter 2], the Buddha expounds a well-known teaching called, “A small good deed leads a person to become a Buddha.” This teaching states that whenever someone shows sincere faith in the Buddha by performing a good deed, no matter how tiny it may be, this act sets him on the path to Buddhahood, and he or she is sure to become a Buddha eventually. Even though such a person is not yet a Buddha, he or she is on the way, and deserves respect as a future Buddha.
For example, even a person who has never performed any special practice can become a Buddha simply by making an offering, such as incense, flowers, or the wonderful sounds of music, in front of a Stupa (a round dome-shaped shrine) or an image of the Buddha. The sutra repeatedly maintains that such people “have already attained the enlightenment of the Buddha.” Furthermore, just entering a shrine only once and reciting, “Namo Buddhaya” (Homage to the Buddha!), or offering a single flower, is enough to enable anyone to become a Buddha. What is more, even a child at play, who pretends to build a Stupa by heaping up a pile of sand or dirt, “has already become a Buddha.” In the same way, if a child draws a picture of the Buddha on a wall with a stick or the back of his fingernail, and makes a gesture of praying to it, he or she has already become a Buddha (or, as the sutra says again, “has already attained the enlightenment of the Buddha”), (The Buddha is pure good: any act of good on our part, no matter how small or insignificant it may appear to be, puts us in his embrace from which nothing can ever separate us.)
The sutra presents various instances, one by one in order, to show that any small act of good will on our part enables us to become a Buddha. From these concrete examples, we can see that the One Vehicle is the teaching of the Buddha himself—boundless in bounty, pouring forth perfect life in limitless supply, lending a hand to everyone, and leading all of us to his own enlightenment. Finally, the sutra adds, “Anyone who even hears the Dharma (law/truth) will not fail to become a Buddha!”
Introduction to the Lotus Sutra