John 3:12

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

John 1:1-14

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

John 3:3

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

John 3:5

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

John 3:8

The wind bloweth where it lifteth, and thou hearest the found thereof, but canst not tell, whence it cometh, and whither it goeth: so is every one that is born of the Spirit.

John 3:13-17

For no one hath gone up to heaven, but he that came down from heaven, the Son of man, who is in heaven.

John 3:31-36

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

1 Corinthians 2:7-9

which God ordained before the world for our glory;

1 Corinthians 3:1-2

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

1 Timothy 3:16

The mystery of godliness is the pillar and ground of the truth, and without controversy a great thing: God was manifested in the flesh, was justified by the spirit, seen by angels, preached among the Gentiles, believed on in the world, taken up into glory.

Hebrews 5:11

Concerning whom we have many things to say, and hard to be explained, seeing ye are become dull of hearing.

1 Peter 2:1-3

Wherefore laying aside all wickedness, and all guile, and dissimulation, and envies,

1 John 4:10

Herein is love; not that we loved God, but that he loved us, and sent his Son, a propitiation 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 to him, Verily, verily I say unto thee, Except a man be born again, he cannot see the kingdom of God.
1 Corinthians 3:1
And I, brethren, could not speak to you as unto spiritual, but as unto carnal, as unto babes in Christ.
Hebrews 5:11
Concerning whom we have many things to say, and hard to be explained, seeing ye are become dull of hearing.
1 Peter 2:1
Wherefore laying aside all wickedness, and all guile, and dissimulation, and envies,

Heavenly

John 3:13
For no one hath gone up to heaven, but he that came down from heaven, the Son of man, who is in heaven.
John 1:1
In the beginning existed the Word, and the Word was with God, and the Word was God.
1 Corinthians 2:7
which God ordained before the world for our glory;
1 Timothy 3:16
The mystery of godliness is the pillar and ground of the truth, and without controversy a great thing: God was manifested in the flesh, was justified by the spirit, seen by angels, preached among the Gentiles, believed on in the world, taken up into glory.
1 John 4:10
Herein is love; not that we loved God, but that he loved us, and sent his Son, a propitiation for our sins.