Deuteronomy 3:16

Be strong and of good courage, do not fear nor be afraid of them; for the Lord your God, He is the One who goes with you. He will not leave you nor forsake you. 

When we have absolute confidence in something, we have no fear — the assurance of what we believe in shifts how we view the circumstance. We wait for the circumstance to change, being fully persuaded that God has answered our prayer. We see the success before the manifestation, and like Abraham are fully persuaded.