11 “If any man serve me, let him follow me.” What is that, “let him follow me,” but just, let him imitate me? “Because Christ suffered for us,” says the Apostle Peter, “leaving us an example that we should follow His steps.” Here you have the meaning of the words, “If any man serve me, let him follow me.” But with what result? What wages? What reward? “And where I am,” He says, “there shall also my servant be.” Let Him be freely loved, that so the reward of the service done Him may be to be with Him. For where will one be well apart from Him, or when will one come to feel himself in an evil case in company with Him? Hear it still more plainly: “If any man serve me, him will my Father honor.” And what will be the honor but to be with His Son? For of what He said before, “Where I am, there shall also my servant be,” we may understand Him as giving the explanation, when He says here, “him will my Father honor.” For what greater honor can await an adopted son than to be with the Only-begotten; not, indeed, as raised to the level of His Godhead, but made a partaker of His eternity?
Source: Tractates on the Gospel of John (New Advent)