Plutarch on education:
οὐ γὰρ ὡς ἀγγεῖον ὁ νοῦς ἀποπληρώσεως ἀλλ᾿ ὑπεκκαύματος μόνον ὥσπερ ὕλη δεῖται, ὁρμὴν ἐμποιοῦντος εὑρετικὴν καὶ ὄρεξιν ἐπὶ τὴν ἀλήθειαν.
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For the mind does not require filling like a vessel, but only kindling, as wood does, to produce in it a desire for discovery and the truth.
On Listening to Lectures 48c