'Pure' in the Bible

Shall mortal man be more just than God? Shall a man be more pure than his Maker?

If thou wert pure and upright: Surely now he would awake for thee, And make the habitation of thy righteousness prosperous.

For thou sayest, My doctrine is pure, And I am clean in thine eyes.

Although there is no violence in my hands, And my prayer is pure.

Behold, even the moon hath no brightness, And the stars are not pure in his sight:

The topaz of Ethiopia shall not equal it, Neither shall it be valued with pure gold.