Athanasius the Great
Catena Aurea · Lukasevangelium 18
And a certain ruler asked him, saying, Good Master, what shall I do to inherit eternal life? And Jesus said unto him, Why callest thou me good? none is good, save one, that is, God. Thou knowest the commandments, Do not commit adultery, Do not kill, Do not steal, Do not bear false witness, Honour thy father and thy mother. And he said, All these have I kept from my youth up. Now when Jesus heard these things, he said unto him, Yet lackest thou one thing: sell all that thou hast, and distribute unto the poor, and thou shalt have treasure in heaven: and come, follow me. And when he heard this, he was very sorrowful: for he was very rich. It follows, And he said, All these things have I kept from my youth up.
(ex Apol. de sua fuga.) For when we despise the world, we must not imagine we have resigned any thing great, for the whole earth in comparison of the heaven is but a span long; therefore even should they who renounce it be lords of the whole earth, yet still it would be nothing worth in comparison of the kingdom of heaven.