God told Abram to leave Ur and travel to a land unknown. Abram “went, as the Lord and told him”. Along the way Abram built altars and worshipped God. He showed great faith, yet made mistakes, travelling to Egypt during a time of famine and lying about his wife.
Psalm 14-16 touch on the idea of deceit. “O Lord, who shall sojourn in your test? … He who walks blamelessly and does what is right and speaks truth in his heart”. We all make mistakes, even great men of faith like Abram and David.
Perhaps that is why there are so many Psalms that talk about God’s care and Him being our refuge. “Preserve me, O God, for in you I take refuge… I have no good apart from you”. David realised and wrote about his mistakes, and his method for dealing with them, both sobering and comforting. He writes “I have set the LORD always before me; because he is at my right hand, I shall not be shaken.”