"Physical courage in whatever scene ... seems to hinge on whether the individual can feel he is fighting for others as well as himself."

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The prophet Isaiah ... points out what will be the cause of this change; for he says that hatred, quarrel, and fighting will come to an end, because men will have a true knowledge of God. "They shall not hurt nor destroy in all my holy mountain: for the earth shall be full of the knowledge of the Lord, as the waters which cover the sea" (Isa. xi. ver. 9) Note it.

— Maimonides