“Truth is ever to be found in simplicity, and not in the multiplicity and confusion of things.”

Light (1919), Ch. XXII - Light
Context: It is not enough to speak; you must know words. When you have said, "I am in pain," or when you have said, "I am right," you have said nothing in reality, you have only spoken to yourself. The real presence of truth is not in every word of truth, because of the wear and tear of words, and the fleeting multiplicity of arguments. One must have the gift of persuasion, of leaving to truth its speaking simplicity, its solemn unfoldings. It is not I who will be able to speak from the depths of myself. The attention of men dazzles me when it rises before me. The very nakedness of paper frightens me and drowns my looks. Not I shall embellish that whiteness with writing like light. I understand of what a great tribune's sorrow is made; and I can only dream of him who, visibly summarizing the immense crisis of human necessity in a work which forgets nothing, which seems to forget nothing, without the blot even of a misplaced comma, will proclaim our Charter to the epochs of the times in which we are, and will let us see it. Blessed be that simplifier, from whatever country he may come, — but all the same, I should prefer him, at the bottom of my heart, to speak French.

Aurea Dicta VI, p. 4.
The Rod, the Root, and the Flower (1895)

Source: Life, the Truth, and Being Free (2010), p. 53

The Transcendent Unity of Religions (1953; revised edition 1984)

Cited in Rules for methodizing the Apocalypse, Rule 9, from a manuscript published in The Religion of Isaac Newton (1974) by Frank E. Manuel, <!-- Oxford University Press -->p. 120, quoted in Never at Rest: A Biography of Isaac Newton (1983) by Richard S. Westfall, p. 326, in Fables of Mind: An Inquiry Into Poe's Fiction (1987) by Joan Dayan, p. 240, and in Everything Connects: In Conference with Richard H. Popkin (1999) by Richard H. Popkin, James E. Force, and David S. Katz, p. 124
Context: It is the perfection of God's works that they are all done with the greatest simplicity. He is the God of order and not of confusion. And therefore as they would understand the frame of the world must endeavor to reduce their knowledge to all possible simplicity, so must it be in seeking to understand these visions.

Source: War and Peace

To H. Austin (4 February 1874) as quoted in Garfield (1978) by Allen Peskin, Ch. 17
1870s

"The Oneness of Mind", as translated in Quantum Questions: Mystical Writings of the World's Great Physicists (1984) edited by Ken Wilber