Source: The Wheel of Time: Shamans of Ancient Mexico, Their Thoughts About Life, Death and the Universe], (1998), Quotations from "The Power of Silence" (Chapter 18)
“The entire method consists in the order and arrangement of the things to which the mind’s eye must turn so that we can discover some truth.”
Rules for the Direction of the Mind: X.379
As quoted in [Clarke, Desmond M., 2006, Descartes : a Biography, Cambridge Press, 67, ISBN 978-0-521-82301-2]
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René Descartes 47
French philosopher, mathematician, and scientist 1596–1650Related quotes

Introduction
1830s, Nature http://www.emersoncentral.com/nature.htm (1836)

Source: The Name of the Rose (Everyman's Library

1910s, The Philosophy of Logical Atomism (1918)
Source: Freedom, Loyalty, Dissent (1954), p. 18

“In the heavens, then, there is no chance, irregularity, deviation, or falsity, but on the other hand the utmost order, reality, method, and consistency. The things which are without these qualities, phantasmal, unreal, and erratic, move in and around the earth below the moon, which is the lowest of all the heavenly bodies. Any one, therefore, who thinks that there is no intelligence in the marvellous order of the stars and in their extraordinary regularity, from which the preservation and the entire well-being of all things proceed, ought to be considered destitute of intelligence himself.”
Nulla igitur in caelo nec fortuna nec temeritas nec erratio nec vanitas inest contraque omnis ordo veritas ratio constantia, quaeque his vacant ementita et falsa plenaque erroris, ea circum terras infra lunam, quae omnium ultima est, in terrisque versantur. caelestem ergo admirabilem ordinem incredibilemque constantiam, ex qua conservatio et salus omnium omnis oritur, qui vacare mente putat is ipse mentis expers habendus est.
Book II, section 21
De Natura Deorum – On the Nature of the Gods (45 BC)
Source: A Mathematical Dictionary: Or; A Compendious Explication of All Mathematical Terms, 1702, p. 26

Source: 1890s, The Principles of Psychology (1890), Ch. 21