A diamond is just a lump of coal that stuck to its job.

Those who fall in love with practice without science are like a sailor who enters a ship without a helm or a compass, and who never can be certain whither he is going.

Make yourself a master of perspective, then acquire perfect knowledge of the proportions of men and other animals.

Necessity is a guardian in Nature.

To make a perfume, take some rose water and wash your hands in it, then take a lavender flower and rub it with your palms, and you will achieve the desired effect

Fear arises sooner than anything else.

The eye transmits its own image through the air to all the objects which face it, and also receives them on its own surface, whence the "sensus communis" takes them and considers them.