'_At that day_,' He goes on, '_ye shall know that I am in my Father, and ye in me, and I in you_.' 'In that day, when you shall begin truly to see me, when you shall know me more fully than you have ever known me yet, in that day the great mystery of my union with the Father will come out fully before you. It will come forth to explain another mystery, which without it would be incredible, that as I am in Him, so you are in me; that as He is in me, so am I in you.' We shall find how this mystery, in connexion with the other, becomes the subject of the subsequent discourse, till it finds its fullest expansion and expression in the prayer of the 17th chapter. But it was necessary that He should set before them once again the nature of the mystery, and the way to the knowledge of it, lest they should lose themselves in abortive efforts to embrace it. '_He that hath my commandments_,' He says, '_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_.' The love of the Father for the Son, and of the Son for the Father, was the ground of their union. He who would remember Christ's commandments that they should love one another, and would watch over them and cherish them in his heart, he would show his love to Christ; and to him the love of the Father would be manifested, to him the Son would manifest Himself. This idea of a secret manifestation which the world could not share in, may have seemed merely astonishing to some of the disciples,--may have awakened certain feelings of vanity, as if they would be His exclusive favourites, in others of them. Either feeling might have been in Jude, or both might have been mixed, when he said, '_Lord, how is it that thou wilt manifest thyself unto us, and not unto the world?_' The answer is one which, if it were taken in, would destroy all exclusiveness, but would not diminish wonder: '_Jesus answered and said unto him, If a man love me, he will keep my words: and my Father will love him, and we will come unto him, and make our abode with him. He that loveth me not keepeth not my words: and the word which ye hear is not mine, but the Father's which sent me._' If a man loved Christ, he would hold fast those words of His in which He said that God '_loved the world, and gave His only-begotten Son for it_;' that God '_sent not His Son to condemn the world, but that the world through Him might be saved_.' And then, because these words were dear to him, and he wished to live in the spirit of them, the Father who loved the world would come and make His abode with him, would impart to him His own likeness, and enable him in a measure to enter into His love. But one who cared nothing for Christ, would not care for these words of His, would not keep them in his heart, would not really believe them, would not desire to have his own mind fashioned in accordance with them.