'Fail' in the Bible

as you teach others, do you fail to teach yourself? As you preach against stealing, do you steal?

For the good that I want to do, I do not do, but I practice the very evil that I do not want.

But again, did Israel fail to understand? Listen to Moses first. He says, "I will fire you with jealousy against a nation which is no nation, and with fury against a nation devoid of understanding."