Augustine of Hippo
Catena Aurea · Johannesevangelium 12
And there were certain Greeks among them that came up to worship at the feast. The same came therefore to Philip, which was of Bethsaida of Galilee, and desired him, saying, Sir, we would see Jesus. Philip cometh and telleth Andrew: and again Andrew and Philip tell Jesus. And Jesus answered them, saying, The hour is come, that the Son of man should be glorified. Verily, verily, I say unto you, Except a corn of wheat fall into the ground and die, it abideth alone: but if it die, it bringeth forth much fruit. He that loveth his life shall lose it, and he that hateth his life in this world shall keep it unto life eternal. If any man serve me, let him follow me; and where I am, there shall also my servant be: if any man serve me, him will my Father honour. Philip cometh and telleth Andrew.
(Tr. li) But what is it to serve Christ? The very words explain. They serve Christ who seek not their own things, but the things of Jesus Christ, i. e. who follow Him, walk in His, not their own, ways, do all good works for Christ’s sake, not only works of mercy to men’s bodies, but all others, till at length they fulfil that great work of love, and lay down their lives for the brethren. But what fruit, what reward? you ask. The next words tell you: And where I am, there shall also My servant be. Love Him for His own sake, and think it a rich reward for thy service, to be with Him.