When you draw a nude, sketch the whole figure and nicely fit the members to it and to each other. Even though you may only finish one portion of the drawing, just make certain that all the parts hang together, so that the study will be useful to you in the future.

In rivers, the water that you touch is the last of what has passed and the first of that which comes; so with present time.

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.

The Medici created and destroyed me.

The desire to know is natural to good men.

Those who, in debate, appeal to their qualifications, argue from memory, not from understanding.

If a man has a tent made of linen of which the apertures have all been stopped up, and be it twelve bracchia across (over twenty-five feet) and twelve in depth, he will be able to throw himself down from any height without sustaining injury. [His concept of the parachute.]