My conduct must be the best proof, the moral proof, of my supreme desire; and if I do not end by convincing myself, within the bounds of the ultimate and irremediable uncertainty of the truth of what I hope for, it is because my conduct is not sufficiently pure. Virtue, therefore, is not based upon dogma, but dogma upon virtue, and it is not faith that creates martyrs but martyrs who create faith. There is no security or repose — so far as security and repose are obtainable in this life, so essentially insecure and unreposeful — save in conduct that is passionately good.

The Tragic Sense of Life (1913) - XI : The Practical Problem