“The stages of human development are to strive for:
(1) Besitz [Possession]
(2) Wissen [Knowledge]
(3) Können [Ability]
(4) Sein”

—  Erwin Schrödinger

Being
Writings of August 1918, quoted in A Life of Erwin Schrödinger (1994) by Walter Moore

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Erwin Schrödinger 67
Austrian physicist 1887–1961

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