Romans 1:19

because what should be known of God they are acquainted with; for God hath manifested it unto them.

Romans 1:20

for ever since the creation of the world, his eternal power and divinity, things in themselves invisible, are clearly seen, being perceived by the things that are made; so that they are without excuse:

John 1:9

HE was the true Light who came into the world, to enlighten every man.

Acts 14:16-17

who in past ages has let all Nations proceed in their own ways.

Acts 17:23-30

for considering, as I pass'd along, the deitys, which you adore, I met with an altar that had this inscription, TO THE UNKNOWN GOD. now that GOD whom you worship without knowing him, is the same that I denounce to you.

Treasury of Scripture Knowledge

Summary

Because that which may be known of God is manifest in them; for God hath shewed it unto them.

For god

Bible References

That which

Romans 1:20
for ever since the creation of the world, his eternal power and divinity, things in themselves invisible, are clearly seen, being perceived by the things that are made; so that they are without excuse:
Acts 14:16
who in past ages has let all Nations proceed in their own ways.
Acts 17:23
for considering, as I pass'd along, the deitys, which you adore, I met with an altar that had this inscription, TO THE UNKNOWN GOD. now that GOD whom you worship without knowing him, is the same that I denounce to you.

For god

John 1:9
HE was the true Light who came into the world, to enlighten every man.