Habit is a form of exercise.
There is no freedom on earth or in any star for those who deny freedom to others.
Love, we say, is life; but love without hope and faith is agonizing death.
It does not make much difference what a person studies-all knowledge is related, and the man who studies anything, if he keeps at it, will be learned.
The reason men oppose progress is not that they hate progress, but that they love inertia.
Life is a paradox. Every truth has its counterpart which contradicts it; and every philosopher supplies the logic his own undoing.