Augustine of Hippo
Catena Aurea · Johannesevangelium 13
Little children, yet a little while I am with you. Ye shall seek me: and as I said unto the Jews, Whither I go, ye cannot come; so now I say to you. A new commandment I give unto you, That ye love one another; as I have loved you, that ye also love one another. By this shall all men know that ye are my disciples, if ye have love one to another.
(Tr. lxiv. 4) Or He means that they were not yet fit to follow Him to death for righteousness’ sake. For how could they, when they were not ripe for martyrdom? Or how could they follow our Lord to immortality, they who were to die, and not to rise again till the end of the world? Or how could they follow Him to the bosom of the Father, when none could partake of that felicity, but they whose love was perfected? When He told the Jews this, He did not add now. But the disciples, though they could not follow Him then, would be able to do so afterwards, and therefore He addsc, So now I say to you.