The Power of Positive Thinking Happiness," published in 1950, and "Inspiring Messages for Daily Living", published in 1955. "The Power of Positive Thinking" appeared at a time when Christian church attendance was drastically increasing, national views of spirituality, individuality, and religion were shifting, and the Cold War was a growing concern for many Americans. These factors, as well as Peale's growing popularity as a motivational public figure and the book's clear prose, propelled "The Power of Positive Thinking" into a self-help book still popular today. Peale begins by stating ten rules for “overcoming inadequacy attitudes and learning to practice faith”. The rules include the following:
The Power of Positive Thinking effectiveness of Peale's positive thinking techniques in the antagonistic environment Peale presents. Episcopal theologian John M. Krumm criticized Peale's teachings for their basis in religion, defining his teachings as heretical. Krumm writes that "the emphasis upon techniques such as the repetition of confident phrases” or “the manipulation of certain mechanical devices” gives “the impression of a thoroughly depersonalized religion. Very little is said about the sovereign mind and purpose of God; much is made of the things men can say to themselves and can do to bring about their ambitions and purposes." Krumm argues that Peale does not have the