Matthew 11:27

"All things have been delivered to me by my Father. No one knows the Son except the Father, and no one knows the Father except the Son and those to whom the Son chooses to reveal him.

John 17:3

And this is eternal life, that they may know you, the only true God, and Jesus Christ whom you have sent.

1 John 5:20

And we know that the Son of God has come and has given us understanding, that we may know him who is true; and we are in him who is true, in his Son Jesus Christ. This is the true God and eternal life.

Treasury of Scripture Knowledge

Summary

The fear of the LORD is the beginning of wisdom: and the knowledge of the holy is understanding.

Bible References

The knowledge

Matthew 11:27
"All things have been delivered to me by my Father. No one knows the Son except the Father, and no one knows the Father except the Son and those to whom the Son chooses to reveal him.
John 17:3
And this is eternal life, that they may know you, the only true God, and Jesus Christ whom you have sent.
1 John 5:20
And we know that the Son of God has come and has given us understanding, that we may know him who is true; and we are in him who is true, in his Son Jesus Christ. This is the true God and eternal life.