Leonardo DaVinci

The tears come from the heart and not from the brain.

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Man when flying must stand free from the waist upwards so as to be able to balance himself as he does in a boat so that the centre of gravity in himself and in the machine may counter-balance each other, and be shifted as necessity demands for the changes of its centre of resistance.

declaimers of the works of others, must be regarded and not otherwise esteemed than as the object in front of a mirror, when compared with its image seen in the mirror. For the first is something in itself, and the other nothingness – folks little indebted to Nature, since it is only by chance that they wear the human form and without it I might class them with the herds of beasts.