Luke 18:28

As if he says, We have done what Thou commandedst us, what reward then wilt Thou give us? And because it is not enough to have left all things, he adds that which made it perfect, saying, And have followed thee.

But Peter said: Behold, we have left everything and followed you. Great confidence. Peter was a fisherman, he was not rich, he sought food by hand and skill, and yet he speaks confidently, We have left everything. And because it is not enough to just leave, he adds what is perfect: And followed you. We have done what you commanded, so what reward will you give us?

The rich man who has despised many things will naturally expect a reward, but he who possessing little resigns what he has, may fairly ask what there is in store for him; as it follows, Then Peter said, Lo, we have left all. Matthew adds, What shall we have therefore? (Matt. 19:27.) It was necessary to say this, because those who forsake a few things, as far as regards their motives and obedience, are weighed in the same balance with the rich, who have forsaken all, inasmuch as they act from the like affections, in voluntarily making a surrender of all that they possess. And therefore it follows, Verily I say unto you, there is no man that hath left house, &c. who shall not receive manifold more, &c. He inspires all who hear Him with the most joyful hopes, confirming His promises to them with an oath, beginning His declaration with Verily. For when the divine teaching invites the world to the faith of Christ, some perhaps regarding their unbelieving parents are unwilling to distress them by coming to the faith, and have the like respect of others of their relations; while some again forsake their father and mother, and hold lightly the love of their whole kindred in comparison of the love of Christ. This then we say, that he who gives up all worldly and carnal things will gain for himself far greater, inasmuch as the Apostles, after leaving a few things, obtained the manifold gifts of grace, and were accounted great every where. We then shall be like to them. If a man has left his home, he shall receive an abiding place above. If his father, he shall have a Father in heaven. If he has forsaken his kindred, Christ shall take him for a brother. If he has given up a wife, he shall find divine wisdom, from which he shall beget spiritual offspring. If a mother, he shall find the heavenly Jerusalem, who is our mother. From brethren and sisters also united together with him by the spiritual bond of his will, he shall receive in this life far more kindly affections.