'Good Courage' in the Bible

Be strong and of a good courage: for to this people shalt thou divide for an inheritance the land which I swore to their fathers to give them.

Have not I commanded thee? Be strong and of a good courage; be not afraid, neither be thou dismayed: for the LORD thy God is with thee whithersoever thou goest.

Every one that doth rebel against thy commandment, and will not hearken to thy words in all that thou commandest him, shall be put to death: only be strong and of a good courage.

And Joshua said to them, Fear not, nor be dismayed, be strong and of good courage: for thus shall the LORD do to all your enemies against whom ye fight.