First capital

Books constitute capital. A library book lasts as long as a house, for hundreds of years. It is not then an article of mere consumption, but fairly of capital, and often in the case of professional men, setting out in life, it is their only capital.

Thomas Jefferson
(letter to James Madison, 16 September 1821)
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Life formula from Wozniak

If I died and had all this wealth and yachts and all this stuff, would I be as happy as when I laugh? And I thought about pranks I played and jokes I had told and music I would hear that would make me smile, and I came up with my formula that life is about happiness. Happiness equals smiles minus frowns. H = S – F.

Steve Wozniak (Apple co-founder)