“Morality may consist solely in the courage of making a choice.”

When considering the broadest sense of meaning and the related legalisms, I like it.

If morality was easy, you wouldn't need to muster the courage to make a choice. Integrity often requires abstaining from impulsive actions.

Morality may consist solely in the courage of making a right choice.

Moral goodness is a choice. given it is the exercising of virtue. "There hath no temptation taken you other than that which is common to man, but God is faithful who will not suffer you to be tempted above that you are able. but will with the temptation make a way to escape that you may be able to bear it." Apostle Paul. 
sensing "that way to escape" is a great Token when under grace in that long dark night. Do that which is right and you will have praise of the same.