Theoretical Knowledge Is Not Equal to Realization

If one lacks the meditative concentration needed for contemplative practice (vipaśyanā-caryā), then even when using anatomical diagrams to contemplate the illusory, selfless nature of the physical body, no matter how long one contemplates, the anatomical diagram remains an anatomical diagram, and you remain you—it has no effect; you merely gain some knowledge of human anatomy. Being able to talk fluently about anatomy does not mean one possesses the wisdom and realization of having eradicated the view of the body. Talking is just talking; without meditative concentration, there can be no contemplative practice—it is merely study. Calm and insight proceeding together, the equal cultivation of Samādhi and Prajñā—this is the true entry point of genuine practice. Studying theoretical knowledge and actually engaging in contemplative practice are two different stages of cultivation. One must never mistake studying theory for contemplative practice, nor take memorized knowledge to be one's own wisdom.

For someone whose preparatory concentration (anāgamya-samādhi) is not complete, or who has no meditative concentration at all, to claim that they have eradicated the view of self (satkāya-dṛṣṭi-prahāṇa) and attained the first or second fruit and the like—that is impossible. Deep within, there would be no such confirmation; even if the conscious mind might be able to confirm it, deep in the heart there would still be doubt, and one would not dare to truly confirm it.