Acts 17:23

For while passing along and observing your objects of worship, I found also an altar with this inscription, "To an unknown God." What therefore ye, without knowledge of it, worship, that do I make known to you.

John 4:22

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

Acts 17:30

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

2 Thessalonians 2:4

he that opposeth and exalteth himself above every one that is called God, or worthy of worship, so that he sitteth in the temple of God, showing himself to be God.

Matthew 15:9

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

John 8:54

Jesus answered, If I glorify myself, my glory is nothing. It is my Father that glorifieth me, of whom ye say, He is our God:

John 17:3

And this is the everlasting life, to know thee, the only true God, and Jesus Christ whom thou didst send.

John 17:25

Righteous Father! and yet the world knew thee not! but I knew thee, and these knew that thou didst send me.

Romans 1:20-25

For, ever since the creation of the world, his invisible attributes, even his eternal power and divinity, being perceived from his works, are clearly seen, so that they might be without excuse.

Romans 1:28

And as they did not choose to retain God in their knowledge, God gave them up to a reprobate mind, to do things which are shameful;

1 Corinthians 1:21

For since, in the wisdom of God, the world by its wisdom knew not God, it pleased God by the foolishness of preaching to save those who believe;

1 Corinthians 8:5

For though there are those that are called gods, whether in heaven or on earth; as there are gods many, and lords many;

2 Corinthians 4:4-6

in whom the God of this world blinded the understandings of the unbelieving, so that they cannot behold the light of the gospel of the glory of Christ, who is the image of God.

Galatians 4:8-9

But at that time, indeed, when ye knew not God, ye were in slavery to those who in their nature are not gods;

Ephesians 2:12

that ye were at that time without Christ, being aliens from the commonwealth of Israel, and strangers to the covenants of the promise, having no hope, and without God, in the world;

1 Timothy 1:17

Now to the King eternal, the imperishable, invisible, only God, be honor and glory for ever and ever. Amen.

1 John 5:20

And we know that the Son of God hath come, and hath given us understanding, that we may know the True One; and we are in the True One, in his Son Jesus Christ. This is the true God, and everlasting 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 for the glory of the incorruptible God they substituted images of corruptible man, and of birds and fourfooted beasts and creeping things.
1 Corinthians 8:5
For though there are those that are called gods, whether in heaven or on earth; as there are gods many, and lords many;
2 Thessalonians 2:4
he that opposeth and exalteth himself above every one that is called God, or worthy of worship, so that he sitteth in the temple of God, showing himself to be God.

To

John 17:3
And this is the everlasting life, to know thee, the only true God, and Jesus Christ whom thou didst send.
Romans 1:20
For, ever since the creation of the world, his invisible attributes, even his eternal power and divinity, being perceived from his works, are clearly seen, so that they might be without excuse.
1 Corinthians 1:21
For since, in the wisdom of God, the world by its wisdom knew not God, it pleased God by the foolishness of preaching to save those who believe;
2 Corinthians 4:4
in whom the God of this world blinded the understandings of the unbelieving, so that they cannot behold the light of the gospel of the glory of Christ, who is the image of God.
Galatians 4:8
But at that time, indeed, when ye knew not God, ye were in slavery to those who in their nature are not gods;
Ephesians 2:12
that ye were at that time without Christ, being aliens from the commonwealth of Israel, and strangers to the covenants of the promise, having no hope, and without God, in the world;
1 Timothy 1:17
Now to the King eternal, the imperishable, invisible, only God, be honor and glory for ever and ever. Amen.
1 John 5:20
And we know that the Son of God hath come, and hath given us understanding, that we may know the True One; and we are in the True One, in his Son Jesus Christ. This is the true God, and everlasting life.

Ignorantly

Acts 17:30
The times indeed of ignorance God overlooked; but now commandeth all men every where to repent;
Matthew 15:9
But in vain do they worship me, teaching as doctrines the commandments of men."
John 4:22
Ye worship that which ye know not; we worship that which we know; for salvation is from the Jews.
John 8:54
Jesus answered, If I glorify myself, my glory is nothing. It is my Father that glorifieth me, of whom ye say, He is our God: