Church Fathers on John 14:23

but you shall see Me: Judas, not the traitor named Iscariot, but he whose Epistle is read among the Canonical Scriptures, asks His meaning: Judas said to Him, not Iscariot, Lord, how is it that you will manifest Yourself to us, and not to the world? Our Lord in reply explains why He manifests Himself to His own, and not to aliens, viz. because the one love Him, the other do not. Jesus answered and said to him, If a man love Me, he will keep My words.

If you would prove your love, show your works. The love of God is never idle; whenever it is, it does great things: if it do not work, it is not.

How is it, that you will manifest Yourself to us, and not to the world? meaning, Alas, as you art to die, you will appear to us but as one dead. To correct this mistake, He says, I and My Father will come to him, i.e. I shall manifest Myself, even as My Father manifests Himself. And will make our abode with Him; which is not like a dream. It follows, And the word which you hear is not Mine, but the Father’s which sent Me; i.e. He that hears not My words, inasmuch as he loves…