We excuse our sloth under the pretext of difficulty.

Consequently the student who is devoid of talent will derive no more profit from this work than barren soil from a treatise on agriculture.

One should aim not at being possible to understand, but at being impossible to misunderstand.

Nature herself has never attempted to effect great changes rapidly.

By writing quickly we are not brought to write well, but by writing well we are brought to write quickly.

The learned understand the reason of art; the unlearned feel the pleasure.

Let us never adopt the maxim, Rather lose our friend than our jest.