Matthew 25:37 - Ellicott's Commentary On The Whole Bible

When saw we thee an hungred? — It is clear that this question of surprise could not be asked by any who, as believers in Christ, have come under this teaching. They know, even now, the full significance of their acts of mercy, and that knowledge is as their strongest motive. But in the lips of the heathen who stand before the judgment-seat such a question will be natural enough. They have acted from what seemed merely human affection towards merely human objects, and they are therefore rightly represented as astonished when they hear that they have, in their ministrations to the sons of men, been ministering to the Son of Man.