1: Goethe said that if you lose property-you just lose a little, if you lose honor-you lose a lot, if you lose courage-you lose everything.

2. Marshall said that the so-called courage has two meanings, one is to be afraid of what should be afraid, and the other is to dare to challenge what should not be afraid.

Marx said that a gun can't move by itself, and it needs strong muscles and a brave heart.