“Happiness is that state of consciousness which proceeds from the achievement of one's value.”
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Ayn Rand 322
Russian-American novelist and philosopher 1905–1982Related quotes

“Happiness comes from the full use of one's power to achieve excellence.”
Thoughts on Man's Purpose in Life (1974)
Context: Happiness comes from the full use of one's power to achieve excellence. Life is potentially an empty hole, and there are few more satisfying ways of filling it than achieving and exercising excellence.
This principle of excellence is on which Americans seem to be losing, and at a time when the Nation stands in need of it. A lack of excellence implies mediocrity. And in a society that is willing to accept a standard of mediocrity, the opportunities for personal failure are boundless. Mediocrity can destroy us as surely as perils far more famous.
It is important that we distinguish between what it means to fail at a task and what it means to be mediocre. There is all the difference in the world between the life lived with dignity and style which ends in failure, and one which achieves power and glory, yet is dull, unoriginal, unreflective, and mediocre. In a real sense, what matters is not so much whether we make a lot of money or hold a prestigious job; what matter is that we seek out others with knowledge and enthusiasm — that we become people who can enjoy our own company.

“From the prevalent state of the mind, actions proceed, as water rises from a fountain.”
The Common School Journal Vol. IX, No. 12 (15 June 1847), p. 181
Context: Manners easily and rapidly mature into morals. As childhood advances to manhood, the transition from bad manners to bad morals is almost imperceptible. Vulgar and obscene forms of speech keep vulgar and obscene objects before the mind, engender impure images in the imagination, and make unlawful desires prurient. From the prevalent state of the mind, actions proceed, as water rises from a fountain.

[2003, The Play of Masks, World Wisdom, 4, 978-0-94153214-3]
Spiritual life, Sense of the sacred

Source: The Nature of the Physical World (1928), Ch. 13 Reality
Context: The mind-stuff is not spread in space and time. But we must presume that in some other way or aspect it can be differentiated into parts. Only here and there does it arise to the level of consciousness, but from such islands proceeds all knowledge. The latter includes our knowledge of the physical world. <!-- p. 277

Quoted in: Joseph LoConte, "The Golden Rule of Toleration" http://www.christianitytoday.com/ch/thepastinthepresent/historymatters/goldenrule.html, Christianity Today, Accessed 6 March 2011

Materials for an exploratory theory of the network society (2000)

“Learn to value yourself, which means: fight for your happiness.”