"The man who has acquired the habit of study, though for only one hour every day in the year, and keeps to the one thing studied till it is mastered, will be startled to see the way he has made at the end of a twelvemonth."

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These various habits of thought, or habitual expressions of life, are all phases of the single life sequence of the individual; therefore a habit formed in response to a given stimulus will necessarily affect the character of the response made to other stimuli. A modification of human nature at any one point is a modification of human nature as a whole.

— Thorstein Veblen