As a Man Thinketh oleh James Allen

As a Man Thinketh is a literary essay and book by James Allen, published in 1903. It was described by Allen as "... [dealing] with the power of thought, and particularly with the use and application of thought to happy and beautiful issues. I have tried to make the book simple, so that all can easily grasp and follow its teaching, and put into practice the methods which it advises. It shows how, in his own thought—world, each man holds the key to every condition, good or bad, that enters into his life, and that, by working patiently and intelligently upon his thoughts, he may remake his life, and transform his circumstances. The price of the book is only one shilling, and it can be carried in the pocket." It was also described by Allen as "A book that will help you to help yourself", "A pocket companion for thoughtful people", and "A book on the power and right application of thought."

The title is influenced by a verse in the Bible from the Book of Proverbs, chapter 23, verse 7: "As a man thinketh in his heart, so is he". The full passage, taken from the King James Version, is as follows:

Eat thou not the bread of him that hath an evil eye, neither desire thou his dainty meats:
For as he thinketh in his heart, so is he:
Eat and drink, saith he to thee; but his heart is not with thee.
The morsel which thou hast eaten shalt thou vomit up, and lose thy sweet words.

While the passage suggests that one should consider the true motivations of a person who is being uncharacteristically generous before accepting his generosity, the title and content of Allen's work refer to the reader himself. (Wikipedia)

Earl Nightingale and others have supported Allen's interpretation with numerous other quotes and popular writings, older and more recent. Obviously, your own thoughts and understanding will determine what you think Allen's words mean.

James Allen (28 November 1864 – 24 January 1912) was a British philosophical writer known for his inspirational books and poetry and as a pioneer of the self-help movement. His best known work, As a Man Thinketh, has been mass-produced since its publication in 1903. It has been a source of inspiration to motivational and self-help authors.

In 1903 Allen published his third and most famous book As a Man Thinketh. Loosely based on the Biblical passage of Proverbs 23:7, "As a man thinketh in his heart, so is he," the small work eventually became read around the world and brought Allen posthumous fame as one of the pioneering figures of modern inspirational thought. The book's minor audience allowed Allen to quit his secretarial work and pursue his writing and editing career. In 1903, the Allen family retired to the town of Ilfracombe where Allen would spend the rest of his life. Continuing to publish the Epoch, Allen produced more than one book per year until his death in 1912. There he wrote for nine years, producing 19 works.