“The more tranquil a man becomes, the greater is his success, his influence, his power for good. Calmness of mind is one of the beautiful jewels of wisdom.”

As A Man Thinketh (1902), Serenity
Source: As a Man Thinketh

Verse VI.10
Tirukkural

"Passages from the life of a philosopher", The Belief In The Creator From His Works, p. 402
Passages from the Life of a Philosopher (1864)
Context: In the works of the Creator ever open to our examination, we possess a firm basis on which to raise the superstructure of an enlightened creed. The more man inquires into the laws which regulate the material universe, the more he is convinced that all its varied forms arise from the action of a few simple principles. These principles themselves converge, with accelerating force, towards some still more comprehensive law to which all matter seems to be submitted. Simple as that law may possibly be, it must be remembered that it is only one amongst an infinite number of simple laws: that each of these laws has consequences at least as extensive as the existing one, and therefore that the Creator who selected the present law must have foreseen the consequences of all other laws. The works of the Creator, ever present to our senses, give a living and perpetual testimony of his power and goodness far surpassing any evidence transmitted through human testimony. The testimony of man becomes fainter at every stage of transmission, whilst each new inquiry into the works of the Almighty gives to us more exalted views of his wisdom, his goodness, and his power.

Source: Mary Shelley's Frankenstein

Source: Women Can't Hear What Men Don't Say (2000), p. 16.

Universal mind
Source: "I am That." P.89.

The Director, in Ch 10
Brave New World (1932)

Source: Meditations in Wall Street (1940), p. 104

Fragment 50 Voigt
The Willis Barnstone translations, Exhortation to Learning