John 3:12

If I told you earthly things and ye believe not, how shall ye 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 and said unto him, Verily, verily, I say unto thee, Except one be born anew, he cannot see the kingdom of God.

John 3:5

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

John 3:8

The wind bloweth where it will, and thou hearest the voice thereof, but knowest not whence it cometh, and whither it goeth: so is every one that is born of the Spirit.

John 3:13-17

And no one hath ascended into heaven, but he that descended out of heaven, even the Son of man, who is in heaven.

John 3:31-36

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

1 Corinthians 2:7-9

but we speak God's wisdom in a mystery, even the wisdom that hath been hidden, which God foreordained before the worlds unto our glory:

1 Corinthians 3:1-2

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

1 Timothy 3:16

And without controversy great is the mystery of godliness; He who was manifested in the flesh, Justified in the spirit, Seen of angels, Preached among the nations, Believed on in the world, Received up in glory.

Hebrews 5:11

Of whom we have many things to say, and hard of interpretation, seeing ye are become dull of hearing.

1 Peter 2:1-3

Putting away therefore all wickedness, and all guile, and hypocrisies, and envies, and all evil speakings,

1 John 4:10

Herein is love, not that we loved God, but that he loved us, and sent his Son to be the 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 unto him, Verily, verily, I say unto thee, Except one be born anew, he cannot see the kingdom of God.
1 Corinthians 3:1
And I, brethren, could not speak unto you as unto spiritual, but as unto carnal, as unto babes in Christ.
Hebrews 5:11
Of whom we have many things to say, and hard of interpretation, seeing ye are become dull of hearing.
1 Peter 2:1
Putting away therefore all wickedness, and all guile, and hypocrisies, and envies, and all evil speakings,

Heavenly

John 3:13
And no one hath ascended into heaven, but he that descended out of heaven, even 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, even the wisdom that hath been hidden, which God foreordained before the worlds unto our glory:
1 Timothy 3:16
And without controversy great is the mystery of godliness; He who was manifested in the flesh, Justified in the spirit, Seen of angels, Preached among the nations, Believed on in the world, 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 be the propitiation for our sins.

American Standard Version Public Domain