“The eagle must age, renew itself, change its beak and remove its flying feathers. This is a natural process for humans.”

As quoted in Carl Reinhold Bråkenhielm (2009), "Linnaeus and homo religiosus," Universitet, p. 83.

Letter 2
Letters on Logic: Especially Democratic-Proletarian Logic (1906)

The Blackfoot Physics (2006)

Fifth Dialogue
The Ash Wednesday Supper (1584)

Source: "Mathematical retrospections," 2013, p. 142

1849 (quoted in Pathologies of Power, by Paul Farmer, page 323).

22 September 1907
India's Rebirth
Context: It is the nature of human institutions to degenerate, to lose their vitality, and decay, and the first sign of decay is the loss of flexibility and oblivion of the essential spirit in which they were conceived. The spirit is permanent, the body changes; and a body which refuses to change must die. The spirit expresses itself in many ways while itself remaining essentially the same but the body must change to suit its changing environments if it wishes to live. There is no doubt that the institution of caste degenerated. It ceased to be determined by spiritual qualifications which, once essential, have now come to be subordinate and even immaterial and is determined by the purely material tests of occupation and birth. By this change it has set itself against the fundamental tendency of Hinduism which is to insist on the spiritual and subordinate the material and thus lost most of its meaning. The spirit of caste arrogance, exclusiveness and superiority came to dominate it instead of the spirit of duty, and the change weakened the nation and helped to reduce us to our present conditions.

"James Clarence Mangan" (1902)

1940s, State of the Union Address — The Four Freedoms (1941)