Whether endurance is the chief act of fortitude?

Objections

Objection 1 : It seems that endurance is not the chief act of fortitude. For virtue "is about the difficult and the good" (Ethic. ii, 3). Now it is more difficult to attack than to endure. Therefore endurance is not the chief act of fortitude.
Objection 2 : Further, to be able to act on another seems to argue greater power than not to be changed by another. Now to attack is to act on another, and to endure is to persevere unchangeably. Since then fortitude denotes perfection of power, it seems that it belongs to fortitude to attack rather than to endure.
Objection 3 : Further, one contrary is more distant from the other than its mere negation. Now to endure is merely not to fear, whereas to attack denotes a movement contrary to that of fear, since it implies pursuit. Since then fortitude above all withdraws the mind from fear, it seems that it regards attack rather than endurance.