To rove about, musing, that is to say loitering, is, for a philosopher, a good way of spending time.

Philosophy is the microscope of thought.

The supreme happiness of life is the conviction that we are loved.

There is always more misery among the lower classes than there is humanity in the higher.

The onward march of the human race requires that the heights around it constantly blaze with noble lessons of courage. Deeds of daring dazzle history and form one of man's guiding lights.

Brothers, he who dies here dies in the radiance of the future, and we are entering a tomb all flooded with the dawn.

I think, therefore I doubt.