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 Peale's teachings “lead to failure and disillusionment, and not only boomerang back against people, but often prejudice them against effective therapy." Another criticism is that Peale's philosophy is not accomplished through his techniques presented. R. C. Murphy writes that Peale's teachings “endorse the cruelties which men commit against each other” which encourages readers to “give up [their] strivings and feel free to hate as much as [they] like”. Murphy argues that by teaching others to destroy all negativity, Peale is, in fact, fostering negativity and aggression. Harvard scholar Donald Meyer presents a similar criticism in his article "Confidence Man" written