As a general thing, I have not 'duped the world' nor attempted to do so... I have generally given people the worth of their money twice told.

I never liked to work, I mean manual work.

Unless a man enters upon the vocation intended for him by nature, and best suited to his peculiar genius, he cannot succeed.

The orthodox faith painted God as a revengeful being, and yet people talk about loving such a being.

No profession, trade, or calling, is overcrowded in the upper story.

Science is the pursuit of pure truth, and the systematizing of it.

Whatever you do, do it ardently.