Plutarch's Platonic questions (1.4)

Mark this well, that poetry, mathematics, oratory, and sophistry, which are the things the Deity forbade Socrates to generate, are of no value; and that of the sole wisdom about what is divine and intelligible (which Socrates called amiable and eligible for itself), there is neither generation nor invention by man, but reminiscence. Wherefore Socrates taught nothing, but suggesting principles of doubt, as birth-pains, to young men, he excited and at the same time confirmed the innate notions. This he called his Art of Midwifery, which did not (as others professed) extrinsically confer intelligence upon his auditors; but demonstrated it to be innate, yet imperfect and confused, and in want of a nurse to feed and strengthen it.