Nothing is so much to be feared as Evil Report.

Ask advice of him who governs himself well.

The faculty of imagination is both the rudder and the bridle of the senses.

Nature is so delightful and abundant in its variations that among trees of the same kind there would not be found one which nearly resembles another, and not only the plants as a whole, but among their branches, leaves, and fruit, will not be found one which is precisely like another.

We are deceived by promises and time disappoints us.

Obstacles cannot bend me. Every obstacle yields to effort.

Experiment is the sole interpreter of the artifices of Nature.