“India's education had two aims, both organically linked. One was to strengthen our body and mind, our nerves and vitality. If the Indian teaching on this subject is followed faithfully, it ensures full, vigorous, healthy and long life. Similarly, it ensures health and unimpaired senses and a mind with undiminished powers. According to the Hindu Psychology, a man's mind and senses are powers of the soul. Therefore, they should be strengthened, widened, deepened, purified. "May I see and hear clearly and abundantly", is the repeated prayer in the, several Upanishads. Another variant of this prayer is: "May our eyes see the good, our ears hear the good." To see and hear and desire better, purer, finer and deeper is the first aim of Indian education. This means strengthening character, controlling desires and impulses, increasing powers of concentration and will. Not only this opens up our hidden powers, but this is even the basis of any fruitful life at all. If our senses and mind run their unbridled course, uninformed by any higher light, they will lead to self-destruction. But purified in the light of the soul, they become a blessing.”

Source: Bird by Bird: Some Instructions on Writing and Life

No. 147
The Tatler (1711–1714)

Speech to the United Parents Association, as quoted in The New York Times (6 April 1958)

The lecture in Ashland, Oregon (8th of July 2005)

1960s, Where Do We Go from Here: Chaos or Community? (1967)
Context: As long as the mind is enslaved, the body can never be free. Psychological freedom, a firm sense of self-esteem, is the most powerful weapon against the long night of physical slavery. No Lincolnian emancipation proclamation or Johnsonian civil rights bill can totally bring this kind of freedom. The negro will only be free when he reaches down to the inner depths of his own being and signs with the pen and ink of assertive manhood his own emancipation proclamation. And, with a spirit straining toward true self-esteem, the Negro must boldly throw off the manacles of self-abegnation and say to himself and to the world, "I am somebody. I am a person. I am a man with dignity and honor. I have a rich and noble history, however painful and exploited that history has been. Yes, I was a slave through my foreparents, and now I’m not ashamed of that. I'm ashamed of the people who were so sinful to make me a slave." Yes, yes, we must stand up and say, "I'm black, but I'm black and beautiful." This, this self-affirmation is the black man's need, made compelling by the white man's crimes against him.

Source: Bellum Catilinae (c. 44 BC), Chapter I

Chapter 32 https://www.marxists.org/reference/archive/mao/works/red-book/ch32.htm, originally published in Talks at the Yenan Forum on Literature and Art (May 1942), Selected Works, Vol. III, p. 84.
Quotations from Chairman Mao Zedong (The Little Red Book)

"Princeton In The Nation's Service" (21 October 1896)
1890s

Gesammelte Mathematische Werke (1876)