If you want to change your life, do it flamboyantly and start immediately.

Philosophy is at once the most sublime and the most trivial of human pursuits. It works in the minutest crannies and it opens outthe widest vistas. It 'bakes no bread', as has been said, but it can inspire our souls with courage.

The prevalent fear of poverty among the educated classes is the worst moral disease from which our civilization suffers.

For morality life is a war, and the service of the highest is a sort of cosmic patriotism which also calls for volunteers.

That which is most personal, is most interesting.

Need and struggle are what excite and inspire us; our hour of triumph is what brings the void.

Neither moral relations nor the moral law can swing in vacuo. Their only habitat can be a mind which feels them; and no world composed of merely physical facts can possibly be a world to which ethical propositions apply.