What does "courage of one's convictions, have the" mean?
Behave according to one's beliefs. For example, Carl wouldn't give his best friend any of the test answers; he had the courage of his convictions. This expression is believed to have originated as a translation of the French le courage de son opinion (“the courage of his opinion”), dating from the mid-1800s and at first so used. By the late 1800s it had changed to the present form.