In Rom 4:20-21, Paul reveals that Abraham did not waver in his faith.  He knew the promise of God.  This enables him to be strengthened in His faith and give glory to God.  Abraham knew beyond a shadow of doubt that God could do what He said He would do.  God is the God of the impossible.  You will never waver in the faith when you have met the Lord face to face.  Charles Stanley says, You will never fall when you have been intimate with God."  Will you stand on God’s promise, never waver, give God the glory and believe Him?  If you do you will see God do the impossible.