John 3:12

If I told you earthly things and you do not 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, "Truly, truly, I tell you, unless one is born again he cannot see the Kingdom of God."

John 3:5

Jesus answered, "Truly, truly, I tell you, unless one is born of water and Spirit he cannot enter into the Kingdom of God.

John 3:8

The wind blows where it wants to, and you hear its sound, but do not 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.

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 ages for our glory,

1 Corinthians 3:1-2

And I, brothers, could not address you as spiritual, but as fleshly, as infants in Christ.

1 Timothy 3:16

Without controversy, the mystery of godliness is great: He was revealed in the flesh, justified by 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, and all deceit, and hypocrisy, and envy, and all slander,

1 John 4:10

In this is love, not that we have 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, "Truly, truly, I tell you, unless one is born again he cannot see the Kingdom of God."
1 Corinthians 3:1
And I, brothers, could not address you as spiritual, but as fleshly, as infants 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, and all deceit, and hypocrisy, and envy, and all slander,

Heavenly

John 3:13
No one has ascended into heaven, but he who descended out of heaven, the Son of Man.
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 ages for our glory,
1 Timothy 3:16
Without controversy, the mystery of godliness is great: He was revealed in the flesh, justified by 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 have loved God, but that he loved us, and sent his Son as the atoning sacrifice for our sins.