Hebrews 11: 27 ESV
“By faith he (Moses) left Egypt, not being afraid of the anger of the king, for he endured as seeing him (God) who is invisible.”

When Moses left Egypt, and the armies of Pharaoh followed in hot pursuit to destroy all Israel, Moses was not afraid. He endured the situation as if he saw the invisible God leading the way and protecting from behind. He had no fear. When God tells you to go, know He has the power to lead you and to back you up.