"This is he that came by water and blood, even Jesus Christ; not by water only, but by water and blood. And it is the Spirit that beareth witness, because the Spirit is truth. He that believeth on the Son of God hath the witness in himself. And this is the record, that God hath given to us eternal life, and this life is in his Son. He that hath the Son hath life." --- 1 John 5:6, 10-12.
Jesus came with water and blood; not with water alone, to sanctify us, but also with his blood, to make atonement for our sins.
We should therefore, first of all, penitently seek and obtain remission of sins in his blood, then we may hope to obtain the water of life, the Holy Ghost for our inward purification and sanctification.
And his Holy Spirit will bear witness within us, that the gospel is truth, and that God will fulfil his word, by giving us everlasting life, as he hath promised. We have three witnesses of it in heaven, and three on earth.
And if we believe in Christ, we have this true testimony in oursleves; and may therefore assuredly know, that having the Son of God, we may have life, eternal life; for he is, according to verse 20, "eternal life;" and consequently, being in him, we are already entered into everlasting life.
Let all our tongues be one,
To praise our God on high,
Who from his bosom sent his Son
To fetch us strangers nigh.
My Saviour's pierced side
Pour'd out a double flood;
By water we are purified,
And pardon'd by the blood.
It cost him cries and tears
To bring us near to God;
Great was our debt, and he appears
To make our payment good.