Enjoining right and forbidding wrong

WHAT IS COURAGE?

Courage is not strength of the body. A man may be strong physically, but weak in heart. Rather, courage is the strength of the heart and its steadfastness. The critical factors in warfare are physical strength, skill in warfare, and the courage and steadfastness of the hearts of the fighters.

The only courage which is praiseworthy is courage based on knowledge and information, not mere wildness, with neither thought nor differentiation between praiseworthy and blameworthy actions. For this reason the strong and capable, as defined by Islam, is the one who can control himself when in anger such that he does only that which is truly beneficial. As for the one who is overcome by his anger, he is neither courageous nor capable.