The strenuous life tastes better. - William James

In order to disprove the assertion that all crows are black, one white crow is sufficient.

One mode of emotional excitability is exceedingly important in the composition of the energetic character, from its peculiarly destructive power over inhibitions. I mean what in its lower form is mere irascibility, susceptibility to wrath, the fighting temper; and what in subtler ways manifests itself as impatience, grimness, earnestness, severity of character. Earnestness means willingness to live with energy, though energy bring pain. The pain may be pain to other people or pain to one's self — it makes little difference; for when the strenuous mood is on one, the aim is to break something, no matter whose or what. Nothing annihilates an inhibition as irresistibly as anger does it; for, as Moltke says of war, destruction pure and simple is its essence.

Without risks or prizes for the darer, history would be insipid indeed; and there is a type of military character which every one feels that the race should never cease to breed, for everyone is sensitive to its superiority. The duty is incumbent on mankind, of keeping military character in stock — if keeping them, if not for use, then as ends in themselves and as pure pieces of perfection, — so that Roosevelt's weaklings and mollycoddles may not end by making everything else disappear from the face of nature.