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 backing of religion to support his techniques. Krumm continues with a warning: "the predominant use of impersonal symbols for God is a serious and dangerous invitation to regard man as the center of reality and the Divine Reality as an impersonal power, the use and purpose of which is determined by the man who takes hold of it and employs it as he thinks best.” Edmund Fuller, book review editor of the "Episcopal Churchnews," warned against following Peale's teachings in an article titled “Pitchmen in the Pulpit” from March 1957. Fuller cautions readers not to believe Peale just because he