Neither the true nor the false roots are always real; sometimes they are imaginary; that is, while we can always imagine as many roots for each equation as I have assigned, yet there is not always a definite quantity corresponding to each root we have imagined.

Good sense is the most equitably distributed of all things because no matter how much or little a person has, everyone feels so abundantly provided with good sense that he feels no desire for more than he already possesses.

The senses deceive from time to time, and it is prudent never to trust wholly those who have deceived us even once.

Human wisdom remains always one and the same although applied to the most diverse objects and it is no more changed by their diversity than the sunshine is changed by the variety of objects which it illuminates.

The reading of all good books is like a conversation with the finest minds of past centuries.

Omnia apud me mathematica fiunt.

I desire to live in peace and to continue the life I have begun under the motto 'to live well you must live unseen