One day someone called the Institute and asked to speak to a particular dean. When his secretary said that the dean wasn’t available, the caller hesi… - Walter Isaacson

Imagination is more important than knowledge.

Temperance: Eat not to dullness; drink not to elevation. Silence: Speak not but what may benefit others or yourself; avoid trifling conversation. Order: Let all your things have their places; let each part of your business have its time. Resolution: Resolve to perform what you ought; perform without fail what you resolve. Frugality: Make no expense but to do good to others or yourself; (i.e., waste nothing). Industry: Lose no time; be always employed in something useful; cut off all unnecessary actions. Sincerity: Use no hurtful deceit; think innocently and justly, and, if you speak, speak accordingly. Justice: Wrong none by doing injuries, or omitting the benefits that are your duty. Moderation: Avoid extremes; forbear resenting injuries so much as you think they deserve. Cleanliness: Tolerate no uncleanliness in body, clothes, or habitation. Tranquility: Be not disturbed at trifles, or at accidents common or unavoidable. Chastity: Rarely use venery but for health or offspring, never to dullness, weakness, or the injury of your own or another’s peace or reputation.

Seek knowledge for its own sake. Not all knowledge needs to be useful. Sometimes it should be pursued for pure pleasure. Leonardo did not need to know how heart valves work to paint the Mona Lisa, nor did he need to figure out how fossils got to the top of mountains to produce Virgin of the Rocks. By allowing himself to be driven by pure curiosity, he got to explore more horizons and see more connections than anyone else of his era.