At that day - In the time when my life shall be fully manifested to you, and you shall receive the assurance that I live. This refers to the time after his resurrection, and to the manifestations which in various ways he would make that he was alive.

That I am in my "Father ... - That we are most intimately and indissolubly united. See the notes at John 10:38.

Ye in me - That there is a union between us which can never be severed. See the notes at John 15:1-7.

That I am in my Father - After my resurrection, ye shall be more fully convinced of this important truth, that I and the Father are One; for I will live in you by the energy of my Spirit, and ye shall live in me by faith, love, and obedience.

At that day ye shall know,.... The things they should know, or the objects of knowledge are,

that I am in my Father; in his bosom, in union with him, partaker of the same nature, perfections, and glory with him, and equal to him:

and you in me: that they were in union with him as the branches in the vine, and as the members are in the head, and how they were loved in him, chosen in him, righteous in him, risen with him, and made to sit together in heavenly places in him:

and I in you; formed in their hearts, living in them, dwelling in them, as in his temples, and filling them with grace and glory. The knowledge of these things promised, designs a more clear and distinct knowledge of them; something of them was known already, but not so perfectly as should be hereafter; and this does not suppose that these unions between the Father and Christ, and between Christ and his people, shall then begin to be; for as the union between the Father and the Son is as eternal as themselves; so the union between Christ and his people, as he is the head and representative of them, is as early as his investiture with the office of a Mediator, and his suretyship engagements for them, which were from eternity; and are the ground, and foundation of his being in them, and they in him in the effectual calling; nor does it suggest that they shall begin to be known; only that they shall be known in a more perfect manner: the time when this will be, is "at that day": meaning either when he should "live" in the body again, be raised from the dead, when he should he declared to be the Son of God with power, when it would appear, that he had the same power with the Father, by raising himself from the dead, and when he would rise as a public head representing them, for their justification, and they should see themselves justified and discharged in him; or the day of "Pentecost", when "the Spirit of truth", he promises to pray for, should come to them in an extraordinary manner, and lead them into the knowledge of these things; or the last day, the resurrection morn, when, by virtue of union to Christ, the saints shall rise and "live" with him for ever, and shall have a perfect knowledge of these several unions; see John 17:21.

At that day ye shall know that I am {i} in my Father, and ye in me, and I in you.

(i) The Son is in the Father in such a way that he is of one selfsame substance with the Father, but he is in his disciples in a different way, as an aider and helper of them.

14:20 At that day ye shall know. That day began on Pentecost. There was no more doubting after the Holy Spirit was sent. That day still comes to every soul that wholly surrenders to the will of Christ (Joh 7:17).

14:20 At that day - When ye see me after my resurrection; but more eminently at the day of pentecost.

20. At that day-of the Spirit's coming.

ye shall know that I am in my Father, ye in me, I in you-(See on [1852]Joh 17:22,23).

14:18-24 Christ promises that he would continue his care of his disciples. I will not leave you orphans, or fatherless, for though I leave you, yet I leave you this comfort, I will come to you. I will come speedily to you at my resurrection. I will come daily to you in my Spirit; in the tokens of his love, and visits of his grace. I will come certainly at the end of time. Those only that see Christ with an eye of faith, shall see him for ever: the world sees him no more till his second coming; but his disciples have communion with him in his absence. These mysteries will be fully known in heaven. It is a further act of grace, that they should know it, and have the comfort of it. Having Christ's commands, we must keep them. And having them in our heads, we must keep them in our hearts and lives. The surest evidence of our love to Christ is, obedience to the laws of Christ. There are spiritual tokens of Christ and his love given to all believers. Where sincere love to Christ is in the heart, there will be obedience. Love will be a commanding, constraining principle; and where love is, duty follows from a principle of gratitude. God will not only love obedient believers, but he will take pleasure in loving them, will rest in love to them. He will be with them as his home. These privileges are confined to those whose faith worketh by love, and whose love to Jesus leads them to keep his commandments. Such are partakers of the Holy Spirit's new-creating grace.