“Look to the essence of a thing, whether it be a point of doctrine, of practice, or of interpretation.”

in [Quantum Optics for Engineers, CRC, New York, 2013, 978-1439888537, F. J. Duarte]

Go Rin No Sho (1645), The Book No-Thing-ness
Context: Until you realise the true Way, whether in Buddhism or in common sense, you may think that things are correct and in order. However, if we look at things objectively, from the viewpoint of laws of the world, we see various doctrines departing from the true Way. Know well this spirit, and with forthrightness as the foundation and the true spirit as the Way. Enact strategy broadly, correctly and openly.
Then you will come to think of things in a wide sense and, taking the void as the Way, you will see the Way as void.
In the void is virtue, and no evil. Wisdom has existence, principle has existence, the Way has existence, spirit is nothingness.

Anarchism or Socialism (1906)
Context: We are not the kind of people who, when the word "anarchism" is mentioned, turn away contemptuously and say with a supercilious wave of the hand: "Why waste time on that, it's not worth talking about!" We think that such cheap "criticism" is undignified and useless.
Nor are we the kind of people who console themselves with the thought that the Anarchists "have no masses behind them and, therefore, are not so dangerous." It is not who has a larger or smaller "mass" following today, but the essence of the doctrine that matters. If the "doctrine" of the Anarchists expresses the truth, then it goes without saying that it will certainly hew a path for itself and will rally the masses around itself. If, however, it is unsound and built up on a false foundation, it will not last long and will remain suspended in mid-air. But the unsoundness of anarchism must be proved.
Some people believe that Marxism and anarchism are based on the same principles and that the disagreements between them concern only tactics, so that, in the opinion of these people, no distinction whatsoever can be drawn between these two trends.
This is a great mistake.
We believe that the Anarchists are real enemies of Marxism. Accordingly, we also hold that a real struggle must be waged against real enemies.

Anarchism & American Traditions (1908)

Wallace Brett Donham (1952). Administration and blind spots: the biography of an adventurous idea. p. 3

Source: Knots Untied (1877), Ch. XIII: "Worship", p. 295

The Memsahib’s Quote of the Day https://survivalblog.com/the_memsahibs_quote_of_the_day_1/, Survivalblog, 5 May 2006

“A Single Spark Can Start a Prairie Fire” (January 5, 1930)

as quoted by Tehmina Durrani author of A Mirror to the Blind, a biography of Abdul Sattar Edhi at Balzan Prize ceremony ( November 17, 2000, http://www.balzan.org/en/prizewinners/abdul-sattar-edhi/abdul-sattar-edhi-in-milan-speech-pronounced-by-tehmina-durrani/), retrieved July 21, 2016