God told Moses to send some men to go spy in the land of Canaan that God had given the Israelites. Moses always obeyed God, so he sent out twelve men, among whom were Joshua and Caleb. The land was rich and full of produce, and all of the spies reported this to Moses, but ten of the men also stirred up the people by predicting certain defeat at the hand of "giants" that lived in the land. God knew those giants were there, of course, but He wasn't concerned about them. Neither were Joshua or Caleb. Numbers 13 says Caleb silenced the naysayers by saying to Moses,"We should go up and take possession of the land, for we can certainly do it." Numbers 13:30
Are you facing any giants? Are there naysayers predicting your inevitable defeat if you take them on? God knows those giants are there. He isn't concerned.
Most of the time, the real giant we face is the naysayer inside of us, battling for the soul. Don't listen to that Liar, for "the One who is in you is greater than the one who is in the world." 1John 4:4