“Fire may be represented as the destroyer of all sophistry, and as the image and demonstration of truth; because it is light and drives out darkness which conceals all essences”

The Notebooks of Leonardo da Vinci (1883), X Studies and Sketches for Pictures and Decorations

The Notebooks of Leonardo da Vinci (1883), X Studies and Sketches for Pictures and Decorations

Source: Sunlight and Shadow: A Retelling of The Magic Flute

'Where Do We Go From Here?" as published in Where Do We Go from Here : Chaos or Community? (1967), p. 62; many statements in this book, or slight variants of them, were also part of his address Where Do We Go From Here?" which has a section below. A common variant appearing at least as early as 1968 has "Returning violence for violence multiplies violence..." An early version of the speech as published in A Martin Luther King Treasury (1964), p. 173, has : "Returning hate for hate multiplies hate..."
1960s
Source: A Testament of Hope: The Essential Writings and Speeches
Context: The ultimate weakness of violence is that it is a descending spiral, begetting the very thing it seeks to destroy. Instead of diminishing evil, it multiplies it. Through violence you may murder the liar, but you cannot murder the lie, nor establish the truth. Through violence you may murder the hater, but you do not murder hate. In fact, violence merely increases hate. So it goes. … Returning hate for hate multiplies hate, adding deeper darkness to a night already devoid of stars. Darkness cannot drive out darkness: only light can do that. Hate cannot drive out hate: only love can do that.

Aeschines, In Timarchum, 84 (107).

Source: Tortall and Other Lands: A Collection of Tales

Book 10: Exposition of Canon II; this is the earliest known description of the inverted image produced by a camera obscura,; as translated in by Ian Jonston in The Mozi (2010), p. 489

Source: Man on His Own: Essays in the Philosophy of Religion (1959), p. 62

The Whig Interpretation of History (1931)