Those who write as they speak, even though they speak well, write badly.

The style is the man himself.

All the work of the crystallographers serves only to demonstrate that there is only variety everywhere where they suppose uniformity ... that in nature there is nothing absolute, nothing perfectly regular.

To be and to think are one and the same for us.

Man thinks, and at once becomes the master of the beings that do not think.

The discoveries that one can make with the microscope amount to very little, for one sees with the mind's eye and without the microscope the real existence of all these little beings.

Style is the essence of man