A being who can create a race of men devoid of real freedom and inevitably foredoomed to be sinners, and then punish them for being what he has made them, may be omnipotent and various other things, but he is not what the English language has always intended by the adjective holy.

The successful conduct of an industrial enterprise requires two quite distinct qualifications: fidelity and zeal.

The individual is not accountable to society for his actions in so far as these concern the interests of no person but himself.

The application of algebra to geometry ... has immortalized the name of Descartes, and constitutes the greatest single step ever made in the progress of the exact sciences.

All desirable things... are desirable either for the pleasure inherent in themselves, or as a means to the promotion of pleasure and the prevention of pain.

...there ought to exist the fullest liberty of professing and discussing, as a matter of ethical conviction, any doctrine, however immoral it may be considered.

The fatal tendency of mankind to leave off thinking about a thing when it is no longer doubtful is the cause of half their errors.