'Pure' in the Bible

Look, if God doesn't trust his holy ones, if even the heavens aren't pure as he looks at them,

even though violence is not my intention, and my prayer is pure."

How can a human being become right with God? How can a human being be pure?

Behold, even the moon isn't bright, and the stars aren't pure in his eyes.

It can neither be compared with the topaz of Ethiopia nor valued in comparison to pure gold."

"I'm pure. I'm without sin; I'm innocent. I'm harboring no iniquity inside of me.