"Thou hast had thty day, old dame, but thy sun has long been set. Thou art now the very emblem of an old warhorse turned out on the barren heath; thou hast had thy paces in thy time, but now a broken amble is the best of them."

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For truly barren is profane education, which is always in labor but never gives birth. For what fruit worthy of such pangs does philosophy show for being so long in labor? Do not all who are full of wind and never come to term miscarry before they come to the light of the knowledge of God, although they could as well become men if they were not altogether hidden in the womb of barren wisdom?

— Gregory of Nyssa