John 3:12

If, when I tell you earthly things, you do not believe me, how will you believe me when I tell you of heavenly things?

John 1:1-14

In the Beginning the Word was; and the Word was with God; and the Word was God.

John 3:3

"In truth I tell you," exclaimed Jesus, "unless a man is reborn, he cannot see the Kingdom of God."

John 3:5

"In truth I tell you," answered Jesus, "unless a man owes his birth to Water and Spirit, he cannot enter the Kingdom of God.

John 3:8

The wind blows where it wills, and you can hear the sound of it, but you do not know whence it comes, or where it goes; it is the same with every one that owes his birth to the Spirit."

John 3:13-17

No one has ascended to Heaven, except him who descended from Heaven--the Son of Man himself.

John 3:31-36

He who comes from above is above all others; but a child of earth is earthly, and his teaching is earthly, too. He who comes from Heaven is above all others.

1 Corinthians 2:7-9

No, it is a divine philosophy that we teach, one concerned with the hidden purpose of God-that long-hidden philosophy which God, before time began, destined for our glory.

1 Corinthians 3:1-2

But I, Brothers, could not speak to you as men with spiritual insight, but only as worldly-minded-mere infants in the Faith of Christ.

1 Timothy 3:16

Yes, and confessedly wonderful are the deep truths of our religion; for-- 'He was revealed in our nature, pronounced righteous in spirit, seen by angels, proclaimed among the Gentiles, believed on in the world, taken up into glory.'

Hebrews 5:11

Now on this subject I have much to say, but it is difficult to explain it to you, because you have shown yourselves so slow to learn.

1 Peter 2:1-3

Now that you have done with all malice, all deceitfulness, insincerity, jealous feelings, and all back-biting,

1 John 4:10

His love is seen in this--not in our having loved God, but in his loving us and sending his Son to be an 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
"In truth I tell you," exclaimed Jesus, "unless a man is reborn, he cannot see the Kingdom of God."
1 Corinthians 3:1
But I, Brothers, could not speak to you as men with spiritual insight, but only as worldly-minded-mere infants in the Faith of Christ.
Hebrews 5:11
Now on this subject I have much to say, but it is difficult to explain it to you, because you have shown yourselves so slow to learn.
1 Peter 2:1
Now that you have done with all malice, all deceitfulness, insincerity, jealous feelings, and all back-biting,

Heavenly

John 3:13
No one has ascended to Heaven, except him who descended from Heaven--the Son of Man himself.
John 1:1
In the Beginning the Word was; and the Word was with God; and the Word was God.
1 Corinthians 2:7
No, it is a divine philosophy that we teach, one concerned with the hidden purpose of God-that long-hidden philosophy which God, before time began, destined for our glory.
1 Timothy 3:16
Yes, and confessedly wonderful are the deep truths of our religion; for-- 'He was revealed in our nature, pronounced righteous in spirit, seen by angels, proclaimed among the Gentiles, believed on in the world, taken up into glory.'
1 John 4:10
His love is seen in this--not in our having loved God, but in his loving us and sending his Son to be an atoning sacrifice for our sins.