As a Man Thinketh is a literary work of James Allen, published in 1902. 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 he is".

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."

Here are some quotes from the book:

    * Men do not attract what they want, but what they are.
    * A man is literally what he thinks, his character being the complete sum of all his thoughts.
    * Cherish your visions. Cherish your ideals. Cherish the music that stirs in your heart, the beauty that forms in your mind, the loveliness that drapes your purest thoughts, for out of them will grow all delightful conditions, all heavenly environment, of these, if you but remain true to them your world will at last be built.
    * The soul attracts that which it secretly harbors, that which it loves, and also that which it fears. It reaches the height of its cherished aspirations. It falls to the level of its unchastened desires - and circumstances are the means by which the soul receives its own.
    * Men are anxious to improve their circumstances, but are unwilling to improve themselves, they therefore remain bound.
    * Every action and feeling is preceded by a thought.
    * Right thinking begins with the words we say to ourselves.
    * Circumstance does not make the man, it reveals him to himself.
    * You cannot travel within and stand without.
    * As the physically weak man can make himself strong by careful and patient training, so the man of weak thoughts, can make them strong by exercising himself in right thinking.