Theophylact of Ohrid
Catena Aurea · Johannesevangelium 14
I will not leave you comfortless: I will come to you. Yet a little while, and the world seeth me no more: but ye see me: because I live, ye shall live also. At that day ye shall know that I am in my Father, and ye in me, and I in you. He that hath my commandments, and keepeth them, he it is that loveth me: and he that loveth me shall be loved of my Father, and I will love him, and will manifest myself to him. Because I live, ye shall live also.
Or, as after the resurrection He was to appear to them in a body more assimilated to His divinity, that they might not take Him then for a spirit, or a phantom, He tells them now beforehand not to have misgivings upon seeing Him, but to remember that He shews Himself to them as a reward for their keeping His commandments; and that therefore they are bound ever to keep them, that they may ever enjoy the sight of Him.