And we know that the Son of God is come, and hath given us an understanding, that we may know him that is true, and we are in him that is true, even in his Son Jesus Christ. This is the true God, and eternal life.(1 John 5:20)

Little children, keep yourselves from idols. Amen.(1 John 5:21)

The elder unto the elect lady and her children, whom I love in the truth; and not I only, but also all they that have known the truth;(2 John 1:1)

For the truth's sake, which dwelleth in us, and shall be with us for ever.

Grace be with you, mercy, and peace, from God the Father, and from the Lord Jesus Christ, the Son of the Father, in truth and love.(2 John 1:3)

I rejoiced greatly that I found of thy children walking in truth, as we have received a commandment from the Father.(2 John 1:4)

And now I beseech thee, lady, not as though I wrote a new commandment unto thee, but that which we had from the beginning, that we love one another.(2 John 1:5)

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2 John 1:2 - Cross Reference

I have written unto you, fathers, because ye have known him that is from the beginning. I have written unto you, young men, because ye are strong, and the word of God abideth in you, and ye have overcome the wicked one. (1 John 2:14)

For we preach not ourselves, but Christ Jesus the Lord; and ourselves your servants for Jesus' sake. (2 Corinthians 4:5)

And this I do for the gospel's sake, that I might be partaker thereof with you. (1 Corinthians 9:23)

If ye abide in me, and my words abide in you, ye shall ask what ye will, and it shall be done unto you. (John 15:7)

If we say that we have no sin, we deceive ourselves, and the truth is not in us. (1 John 1:8)

Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever. (1 Peter 1:23)

When I call to remembrance the unfeigned faith that is in thee, which dwelt first in thy grandmother Lois, and thy mother Eunice; and I am persuaded that in thee also. (2 Timothy 1:5)

Let the word of Christ dwell in you richly in all wisdom; teaching and admonishing one another in psalms and hymns and spiritual songs, singing with grace in your hearts to the Lord. (Colossians 3:16)

Wherefore I will not be negligent to put you always in remembrance of these things, though ye know them, and be established in the present truth. (2 Peter 1:12)

And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever. (1 John 2:17)