Our children may save us if they are taught to care properly for the planet; but if not, it may be back to the Ice Age or the caves from where we first emerged. Then we'll have to view the universe above from a cold, dark place.

Of the original phenomena, light is the most enthralling.

Experiment is the sole interpreter of the artifices of Nature.

Those who are inspired by a model other than Nature, labor in vain.

The false interpreters of nature declare that quicksilver is the common seed of every metal, not remembering that nature varies the seed according to the variety of the things she desires to produce in the world.

Necessity is the theme and the inventress, the eternal curb and law of nature.