John 3:12

If, when I tell you earthly things, ye believe not: How should ye believe if I shall tell you of 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, and said unto him, "Verily, verily I say unto thee: except a man be born anew, he cannot see the kingdom of God."

John 3:5

Jesus answered, "Verily, verily I say unto thee: Except that a man be born of water, and of the spirit, he cannot enter into the kingdom of God.

John 3:8

The wind bloweth where he listeth, and thou hearest his sound: but canst not tell whence he cometh and whither he goeth. So is every man that is born of the spirit."

John 3:13-17

And no man ascendeth up to heaven, but he that came down from heaven, that is to say, the son of man which is in heaven.

John 3:31-36

He that cometh from on high is above all: he that is of the earth is of the earth, and speaketh of the earth. He that cometh from heaven, is above all:

1 Corinthians 2:7-9

but we speak the wisdom of God, which is in secret and lieth hid, which God ordained before the world unto our glory:

1 Corinthians 3:1-2

And I could not speak unto you brethren as unto spiritual: but as unto carnal, even as it were unto babes in Christ.

1 Timothy 3:16

And without nay, great is that mystery of godliness. God was showed in the flesh, was justified in the spirit, was seen of angels, was preached unto the gentiles, was believed on in earth and received up in glory.

Hebrews 5:11

Whereof we have many things to say which are hard to be uttered: because ye are dull of hearing.

1 Peter 2:1-3

Wherefore, lay aside all maliciousness, and all guile, and dissimulation, and envy, and all backbiting:

1 John 4:10

Herein is love, not that we loved God, but that he loved us, and sent his son to make a satisfaction 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 man be born anew, he cannot see the kingdom of God."
1 Corinthians 3:1
And I could not speak unto you brethren as unto spiritual: but as unto carnal, even as it were unto babes in Christ.
Hebrews 5:11
Whereof we have many things to say which are hard to be uttered: because ye are dull of hearing.
1 Peter 2:1
Wherefore, lay aside all maliciousness, and all guile, and dissimulation, and envy, and all backbiting:

Heavenly

John 3:13
And no man ascendeth up to heaven, but he that came down from heaven, that is to say, the son of man which 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 the wisdom of God, which is in secret and lieth hid, which God ordained before the world unto our glory:
1 Timothy 3:16
And without nay, great is that mystery of godliness. God was showed in the flesh, was justified in the spirit, was seen of angels, was preached unto the gentiles, was believed on in earth and received up in glory.
1 John 4:10
Herein is love, not that we loved God, but that he loved us, and sent his son to make a satisfaction for our sins.