In the Diamond Sutra, the Buddha explains that when we vow to liberate all beings, and we do so without attachment to ourselves, to beings, or to liberation, we create a body of merit equivalent to the body of realization (sanbogha-kaya) of every buddha. And it is through the production of such merit that we see our nature and become buddhas.
Hui-Neng
Neal Sivula
@nealjsivula