Acts 17:23

For as I passed along and beheld the objects of your worship, I found an altar, on which was inscribed, TO THE UNKNOWN GOD: him therefore whom ye worship without knowing him, I proclaim unto you.

John 4:22

Ye worship ye know not what; we know what we worship; for salvation is from the Jews.

Acts 17:30

The times of ignorance indeed God overlooked; but he now commandeth all men every where to repent.

2 Thessalonians 2:4

Who opposeth and exalteth himself above all that is called God, or that is worshiped, so that he sitteth in the temple of God as God, declaring himself that he is God.

Matthew 15:9

But in vain do they worship me, teaching for doctrines the commandments of men.

John 8:54

Whom makest thou thyself? Jesus answered, If I honour myself, my honour is nothing: it is my Father that honoureth me, of whom ye say, He is our God.

John 17:3

And this is life eternal, to know thee, the only true God, and Jesus Christ, whom thou hast sent.

John 17:25

Righteous Father, tho' the world hath not known thee, yet I have known thee, and these have known that thou hast sent me.

Romans 1:20-25

For those things of him which are invisible, both his eternal power and Godhead, are clearly seen from the creation of the world, being understood by the things which are made, so that they are without excuse:

Romans 1:28

And as they were not careful to retain God in their knowledge, God gave them up to an undiscerning mind, to do things not expedient, Filled with all injustice, maliciousness, covetousness, wickedness:

1 Corinthians 1:21

For since, in the wisdom of God, the world by wisdom knew not God, it pleased God by the foolishness of preaching to save them that believe.

1 Corinthians 8:5

For though there be that are called gods, whether in heaven or on earth, (as there are many gods and many lords) Yet to us there is but one God,

2 Corinthians 4:4-6

Whose unbelieving minds the god of this world hath blinded, lest the illumination of the glorious gospel of Christ, who is the image of God, should shine upon them.

Galatians 4:8-9

Indeed then, when ye knew not God, ye served them that by nature are not gods.

Ephesians 2:12

being aliens from the commonwealth of Israel, and strangers from the covenants of promise; having no hope, and without God in the world.

1 Timothy 1:17

Now to the king of eternity, immortal, invisible, the only God, be honour and glory for ever and ever, Amen.

1 John 5:20

But we know that the Son of God is come; and he hath given us an understanding that we may know the true one; and we are in the true one, even in his Son Jesus Christ; this is the true God and eternal life.

Treasury of Scripture Knowledge

Summary

For as I passed by, and beheld your devotions, I found an altar with this inscription, TO THE UNKNOWN GOD. Whom therefore ye ignorantly worship, him declare I unto you.

Bible References

Devotions

Romans 1:23
And changed the glory of the incorruptible God into an image in the likeness of corruptible man, and of birds, and of four-footed creatures and reptiles.
1 Corinthians 8:5
For though there be that are called gods, whether in heaven or on earth, (as there are many gods and many lords) Yet to us there is but one God,
2 Thessalonians 2:4
Who opposeth and exalteth himself above all that is called God, or that is worshiped, so that he sitteth in the temple of God as God, declaring himself that he is God.

To

John 17:3
And this is life eternal, to know thee, the only true God, and Jesus Christ, whom thou hast sent.
Romans 1:20
For those things of him which are invisible, both his eternal power and Godhead, are clearly seen from the creation of the world, being understood by the things which are made, so that they are without excuse:
1 Corinthians 1:21
For since, in the wisdom of God, the world by wisdom knew not God, it pleased God by the foolishness of preaching to save them that believe.
2 Corinthians 4:4
Whose unbelieving minds the god of this world hath blinded, lest the illumination of the glorious gospel of Christ, who is the image of God, should shine upon them.
Galatians 4:8
Indeed then, when ye knew not God, ye served them that by nature are not gods.
Ephesians 2:12
being aliens from the commonwealth of Israel, and strangers from the covenants of promise; having no hope, and without God in the world.
1 Timothy 1:17
Now to the king of eternity, immortal, invisible, the only God, be honour and glory for ever and ever, Amen.
1 John 5:20
But we know that the Son of God is come; and he hath given us an understanding that we may know the true one; and we are in the true one, even in his Son Jesus Christ; this is the true God and eternal life.

Ignorantly

Acts 17:30
The times of ignorance indeed God overlooked; but he now commandeth all men every where to repent.
Matthew 15:9
But in vain do they worship me, teaching for doctrines the commandments of men.
John 4:22
Ye worship ye know not what; we know what we worship; for salvation is from the Jews.
John 8:54
Whom makest thou thyself? Jesus answered, If I honour myself, my honour is nothing: it is my Father that honoureth me, of whom ye say, He is our God.