Avatamsaka Sutra
Since reality is unified in these ways, by contemplating one's mind and thought, one can contemplate the whole of reality and thus Buddhahood itself. Zhiyi explains this by commenting on a passage from the "Avatamsaka Sutra" which states that "if one disports one's mind in the dharmadhatu as if in space, then one will know the objective realm of all Buddhas." According to Zhiyi: