'Pure' in the Bible

For this is what we boast about: Our conscience testifies that we have conducted ourselves in the world with pure motives and godly sincerity, without earthly wisdom but with God's grace especially toward you.

I am jealous of you with God's own jealousy, because I promised you in marriage to one husband, to present you as a pure virgin to the Messiah.

However, I am afraid that just as the serpent deceived Eve by its tricks, so your minds may somehow be lured away from sincere and pure devotion to the Messiah.