Acts 17:19-23

And they took hold of him, and brought him unto the Areopagus, saying, May we know what this new teaching is, which is spoken by thee? For thou bringest certain strange things to our ears: we would know therefore what these things mean. (Now all the Athenians and the strangers sojourning there spent their time in nothing else, but either to tell or to hear some new thing.) And Paul stood in the midst of the Areopagus, and said, Ye men of Athens, in all things I perceive that ye are very religious. For as I passed along, and observed the objects of your worship, I found also an altar with this inscription, TO AN UNKNOWN GOD. What therefore ye worship in ignorance, this I set forth unto you.