Let us never adopt the maxim, Rather lose our friend than our jest.
Nature herself has never attempted to effect great changes rapidly.
Fear of the future is worse than one's present fortune.
Consequently the student who is devoid of talent will derive no more profit from this work than barren soil from a treatise on agriculture.
It is fitting that a liar should be a man of good memory.
The learned understand the reason of art; the unlearned feel the pleasure.