In ancient times writing was generally on bamboo or on pieces of silk, which were then called zhi. But silk being expensive and bamboo heavy, these were not convenient to use. Cai Lun then initiated the idea of making paper from bark, hemp, rags, and fishnets.
Be alone, that is the secret of invention; be alone, that is when ideas are born.
The inventor looks upon the world and is not contented with things as they are. He wants to improve whatever he sees, he wants to benefit the world.
Mr. Watson, come here. I want to see you.
If some day they say of me that with the airbrake I contributed something to civilization, something to the safety of human life, it will be sufficient.
