John 3:12

If I told you earthly things and you don't believe, how will you believe if I tell you heavenly things?

John 1:1-14

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

John 3:3

Jesus answered him, "Most certainly, I tell you, unless one is born anew, he can't see the Kingdom of God."

John 3:5

Jesus answered, "Most certainly I tell you, unless one is born of water and spirit, he can't enter into the Kingdom of God!

John 3:8

The wind blows where it wants to, and you hear its sound, but don't know where it comes from and where it is going. So is everyone who is born of the Spirit."

John 3:13-17

No one has ascended into heaven, but he who descended out of heaven, the Son of Man, who is in heaven.

John 3:31-36

He who comes from above is above all. He who is from the Earth belongs to the Earth, and speaks of the Earth. He who comes from heaven is above all.

1 Corinthians 2:7-9

But we speak God's wisdom in a mystery, the wisdom that has been hidden, which God foreordained before the worlds for our glory,

1 Corinthians 3:1-2

Brothers, I couldn't speak to you as to spiritual, but as to fleshly, as to babies in Christ.

1 Timothy 3:16

Without controversy, the mystery of godliness is great: God was revealed in the flesh, justified in the spirit, seen by angels, preached among the nations, believed on in the world, and received up in glory.

Hebrews 5:11

About him we have many words to say, and hard to interpret, seeing you have become dull of hearing.

1 Peter 2:1-3

Putting away therefore all wickedness, all deceit, hypocrisies, envies, and all evil speaking,

1 John 4:10

In this is love, not that we loved God, but that he loved us, and sent his Son as the atoning sacrifice 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 him, "Most certainly, I tell you, unless one is born anew, he can't see the Kingdom of God."
1 Corinthians 3:1
Brothers, I couldn't speak to you as to spiritual, but as to fleshly, as to babies in Christ.
Hebrews 5:11
About him we have many words to say, and hard to interpret, seeing you have become dull of hearing.
1 Peter 2:1
Putting away therefore all wickedness, all deceit, hypocrisies, envies, and all evil speaking,

Heavenly

John 3:13
No one has ascended into heaven, but he who descended out of heaven, the Son of Man, who is in heaven.
John 1:1
In the beginning was the Word, and the Word was with God, and the Word was God.
1 Corinthians 2:7
But we speak God's wisdom in a mystery, the wisdom that has been hidden, which God foreordained before the worlds for our glory,
1 Timothy 3:16
Without controversy, the mystery of godliness is great: God was revealed in the flesh, justified in the spirit, seen by angels, preached among the nations, believed on in the world, and received up in glory.
1 John 4:10
In this is love, not that we loved God, but that he loved us, and sent his Son as the atoning sacrifice for our sins.