The power of the will, however, even when it exists in great strength, is often curiously capricious. History is full of examples of men who in great trials and emergencies have acted with admirable and persevering heroism, yet who readily succumbed to private vices or passions. The will is not the same as the desires, but the connection between them is very close. A love for a distant end; a dominating ambition or passion, will call forth long perseverance in wholly distasteful work in men whose will in other fields of life is lamentably feeble. Every one who has embarked with real earnestness in some extended literary enterprise which as a whole represents the genuine bent of his talent and character will be struck with his exceptional power of traversing perseveringly long sections of this enterprise for which he has no natural aptitude and in which he takes no pleasure. Military courage is with most men chiefly a matter of temperament and impulse, but there have been conspicuous instances of great soldiers and sailors who have frankly acknowledged that they never lost in battle an intense constitutional shrinking from danger, though by the force of a strong will they never suffered this timidity to govern or to weaken them. With men of very vivid imagination there is a natural tendency to timidity as they realise more than ordinary men danger and suffering. On the other hand it has often been noticed how calmly the callous, semi-torpid temperament that characterises many of the worst criminals enables them to meet death upon the gallows.