Plotinus,
Enneads — Nature, Contemplation…
“ Soul is a Reason-Principle and anything that one lays up in the Soul can be no other than a Reason-Principle, a silent thing, the more certainly such a principle as the impression made is the deeper.This vision achieved, the acting instinct pauses; the mind is satisfied and seeks nothing further; the contemplation, in one so conditioned, remains absorbed within as having acquired certainty to rest upon. The brighter the certainty, the more tranquil is the contemplation as having acquired the more perfect unity ”
