In a world where death is the hunter, my friend, there is no time for regrets or doubts. There is only time for decisions.
A warrior knows that he is only a man. His only regret is that his life is so short that he can't grab onto all the things he would like to. But for him, this is not an issue; it's only a pity.
A warrior takes his lot, whatever it may be, and accepts it in ultimate humbleness. He accepts in humbleness what he is, not as a grounds for regret but as a living challenge.
When a man has fulfilled all four of these requisites-to be wide awake, to have fear, respect, and absolute assurance-there are no mistakes for which he will have to account; under such conditions his actions lose the blundering quality of the acts of a fool. If such a man fails, or suffers a defeat, he will have lost only a battle, and there will be no pitiful regrets over that.