Norman Vincent Peale Quotes
Problems are to the mind what exercise is to the muscles, they toughen and make strong.
Citations
Peale, Norman Vincent. The Power of Positive Thinking. Prentice-Hall, 1952.
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Norman Vincent Peale was an American minister and author who is best known for his work in popularizing the concept of positive thinking, especially through his best-selling book The Power of Positive Thinking. He served as the pastor of Marble Collegiate Church, New York, from 1932 until 1984, leading a Reformed Church in America congregation.