A bird is an instrument working according to mathematical law, which instrument it is within the capacity of man to reproduce with all its movements.

I roamed the countryside searching for the answers to things I did not understand. Why shells existed on the tops of mountains along with the imprints of coral and plant and seaweed usually found in the sea. Why the thunder lasts a longer time than that which causes it and why immediately on its creation the lightening becomes visible to the eye while thunder requires time to travel. 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. These questions and other strange phenomena engaged my thought throughout my life.

Whoever does not respect life, does not deserve it.

The vine that has grown old on an old tree falls with the ruin of that tree, and through that bad companionship must perish with it.

Drawing is based upon perspective, which is nothing else than a thorough knowledge of the function of the eye.

Fix your course on a star and you'll navigate any storm.

The lie is so vile, that even if it were in speaking well of godly things, it would take off something from God's grace; and Truth is so excellent, that if it praises but small things they become noble.