Quote by Leonardo da Vinci (1452-1519)

• Learning never exhausts the mind.

• As a well spent day brings happy sleep, so life well used brings happy death.

• Life is pretty simple: You do some stuff. Most fails. Some works. You do more of what works. If it works big, others quickly copy it. Then you do something else. The trick is the doing something else.

• Simplicity is the ultimate sophistication.

• Anyone who invokes authors in discussion is not using his intelligence but his memory.

• I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do.