With regard to happiness, there are, according to Hartmann, three periods or forms of illusion, from all of which the world must be thoroughly freed before the great aim of science can be attained. The first of these illusions consists in the idea that under certain circumstances happiness is now obtainable on earth; the second, in the belief that happiness is realizable in a future state; and the third, in the opinion that happiness will be discovered in the march of progress through the coming centuries.
