The Power of Positive Thinking believe and live successfully.” Peale's work came under criticism from various mental health experts, theologians, and academics. One general criticism against Peale's book was the lack of verified sources. "The Power of Positive Thinking" includes many personal anecdotes that the reader has no way of validating. The book includes stories about “a business executive”, “a man, an alcoholic”, “a famous trapeze artist”, “a friend of [Peale’s], a midwestern businessman”, and other unnamed individuals which cannot be verified from the information Peale presents with each anecdote. R. C. Murphy, a prominent psychiatrist based out of Tacoma, Washington, addresses another criticism of
The Power of Positive Thinking because most obstacles are “mental in character”. Habitual worrying is the next obstacle to overcome through emptying the mind and positive affirmations. Peale then states that asking God for help can solve one's personal problems and physically and emotionally heal them. In chapter twelve, Peale states that letting go of anger and embracing a sense of calm can help with physical illnesses, such as eczema. Next, Peale states that letting positive thoughts in can change one's outlook on life drastically and that practicing relaxation through God's help will lead to a content life. Chapter fifteen gives concrete examples on how