Change your opinions, keep to your principles; change your leaves, keep intact your roots.

Progress is the life-style of man.

Religion, Society, and Nature--these are the three struggles of man.

There is in every village a torch - the teacher; and an extinguisher - the priest.

True or false, that which is said of men often occupies as important a place in their lives, and above all in their destinies, as that which they do.

The repose of darkness is deeper on the water than on the land.

It is the essence of truth that it is never excessive. Why should it exaggerate? There is that which should be destroyed and that which should be simply illuminated and studied. How great is the force of benevolent and searching examination! We must not resort to the flame where only light is required.