John 3:12

If I have told you earthly things and ye do not believe, how shall ye believe if I tell you of heavenly things?

John 1:1-14

In the beginning was the Word, and the Word was with the God, and the Word was God.

John 3:3

Jesus answered and said unto him, Verily, verily, I say unto thee, Except a person be born again from above, he cannot see the kingdom of God.

John 3:5

Jesus answered, Verily, verily, I say unto thee, Unless a man is born of water and of the Spirit, he cannot enter into the kingdom of God.

John 3:8

The wind blows where it desires, and thou hearest the sound of it, but canst not tell from where it comes or where it goes; so is every one that is born of the Spirit.

John 3:13-17

And no one has ascended up to the heaven but he that came down from the heaven, even the Son of man, who is in the heaven.

John 3:31-36

He that comes from above is above all; he that is of the earth is earthly and speaks earthly things: he that comes from heaven is above all.

1 Corinthians 2:7-9

but we speak the wisdom of God in a mystery, even the hidden wisdom, which God predestined before the ages unto our glory,

1 Corinthians 3:1-2

And I, brothers, could not speak unto you as unto spiritual, but as unto carnal, even as unto babes in Christ.

1 Timothy 3:16

And without controversy great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into glory.

Hebrews 5:11

Of whom we have many things to say and difficult to declare, seeing ye are hard of hearing.

1 Peter 2:1-3

Having therefore left all malice and all guile and hypocrisies and envies and all murmurings,

1 John 4:10

In this does the charity consist, not because we had loved God, but because he loved us and has sent his Son to be the reconciliation for our sins.

Treasury of Scripture Knowledge

Summary

If I have told you earthly things, and ye believe not, how shall ye believe, if I tell you of heavenly things?

Bible References

Earthly

John 3:3
Jesus answered and said unto him, Verily, verily, I say unto thee, Except a person be born again from above, he cannot see the kingdom of God.
1 Corinthians 3:1
And I, brothers, could not speak unto you as unto spiritual, but as unto carnal, even as unto babes in Christ.
Hebrews 5:11
Of whom we have many things to say and difficult to declare, seeing ye are hard of hearing.
1 Peter 2:1
Having therefore left all malice and all guile and hypocrisies and envies and all murmurings,

Heavenly

John 3:13
And no one has ascended up to the heaven but he that came down from the heaven, even the Son of man, who is in the heaven.
John 1:1
In the beginning was the Word, and the Word was with the God, and the Word was God.
1 Corinthians 2:7
but we speak the wisdom of God in a mystery, even the hidden wisdom, which God predestined before the ages unto our glory,
1 Timothy 3:16
And without controversy great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into glory.
1 John 4:10
In this does the charity consist, not because we had loved God, but because he loved us and has sent his Son to be the reconciliation for our sins.