Nothing can be loved or hated unless it is first known.

If you do not rest on the good foundation of nature, you will labour with little honor and less profit.

The mind that engages in subjects of too great variety becomes confused and weakened.

A life well used procures a happy death.

Experience is a truer guide than the words of others.

I roamed the countryside searching for answers to things I did not understand. Why shells existed on the tops of mountains. How the various circles of water form around the spot which has been struck by a stone, and why a bird sustains itself in the air.

Lying on a feather mattress or quilt will not bring you renown.