Abraham lied about his wife. He didn't want to be killed because his wife was pretty.
Abraham lacked faith in God. He trusted in himself. When a person trust in himself then that person will fail.
There are many followers of Jesus that have trusted in themselves. The sinful nature can deceive the follower of Jesus and the person that rejects Jesus.
God desire that people will follow him. When a person wants to follow Jesus then God will transform their live lives.
There will be difficult times in this life but a person must have faith in God. God can do many great things but our faith limits the greatness of God.