1 John 1:3

That which we have seen and heard,.... This is repeated, both to confirm and illustrate what had been before said, and to carry on the discourse to what follows:

declare we unto you; in the ministry of the word; the person and offices of Christ being the sum and substance of the Gospel ministration, that declares him to be the true God and eternal life, God over all, blessed for ever; and truly man, made of a woman, and made under the law; and to be the only Mediator between God and man, to be prophet, priest; and King, and to be the alone Saviour and Redeemer: this declares the greatness and excellency of his salvation, what an able, proper, and suitable Saviour he is; and what precious promises and spiritual blessings are in him, even all grace and eternal glory. And this declaration of him is made in the Gospel, for the following ends and purposes,

that ye also may have fellowship with us; in hearing, seeing, and handling of Christ in a spiritual sense; and by enjoying the same privileges in God's house and family, the same ordinances and spiritual provisions; joining and partaking with them in all the immunities and advantages of a Gospel church state here; and by being with them to all eternity hereafter.

And truly our fellowship [is] with the Father; the Father of Christ, the covenant God and Father of his people; and which they have with him, when under the influence and witnessings of the spirit of adoption, and can in the strength of faith call him their Father, draw nigh to him through Christ as such, and are indulged with his presence, and the discoveries of his love:

and with his Son Jesus Christ; being in union to him, they become partakers of him, and of his blessings; they receive out of his fulness, and grace for grace; they are admitted to an intimacy and familiarity with him; they are had into his chambers of secret retirement; they are brought into his banqueting house, where his banner over them is love, and where he sups with them, and they with him; and into this fellowship are they called by the grace of God, through the Gospel; as also they have fellowship with the blessed Spirit, though not here mentioned; see 2 Corinthians 13:14.