Leonardo da Vinci

Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory.

Iron rusts from disuse; water loses its purity from stagnation ... even so does inaction sap the vigor of the mind.

Where the spirit does not work with the hand, there is no art.

You do ill if you praise, but worse if you censure, what you do not understand.

Stop sometimes and look into the stains of walls, or ashes of a fire, or clouds, or mud or like places - you may find marvelous ideas.

Art is never finished, only abandoned.
- All from Leonardo da Vinci, 1452 - 1519

About: Leonardo da Vinci was born at Anchiano, Italy on 15 Apr in 1452, the illegitimate son of Ser piero da Vinci. He was apprenticed to the artist Andrea del Verrocchio, but soon developed his own style which became the High Renaissance standard when Michaelangelo and Raphael adopted it twenty years later. His primary work was art, but his imaginative and inventive mind let him serve, at various times, as an inventor, scientist, engineer, architect, painter, sculptor, musician, mathematician, anatomist, astronomer, geologists, biologist, and philosopher. He wrote the first textbook of human anatomy and was the first to comprehend that the light of the moon was reflected sunlight. He flitted from one thought to another with great speed, finishing very little, the ultimate poster child for Attention Deficit Disorder, but he had a great insight and range.