Lendle

Another of the great books from master of motivation and personal development Charles F. Haanel, author of The Master Key System.

Chemistry is the science which treats of the intra-atomic or the intra-molecular changes which material things undergo under various influences.
Mental is defined as “of or appertaining to the mind, including intellect, feeling, and will, or the entire rational nature.”
Science is knowledge gained and verified by exact observation and correct thinking.
Mental chemistry is, therefore, the science which treats of the changes which material conditions undergo through the operations of the mind, verified by exact observation and correct thinking.

Mental chemistry is a power which is sweeping through eternity, a living stream of relative action in which the basic principle is ever active; it embraces the past and carries it forward into the ever widening future; a movement where relative action, cause, and effect go hand in hand; where law dovetails into law and where all laws are the ever willing handmaids of this great creative force.
This power stretches beyond the utmost planets, beyond a beginning, beyond an ending, and on into a beginningless and endless eternity; it causes the things we see to take form and shape. It brings the fruit from the he blossom and the sweetness to the honey; it measures the sweep of the countless orbs; it lurks in the sparkle in the diamond, and in the amethyst and in the grape; it works in the seen and in the unseen, and it permeates the all.
It is the source of perfect justice, perfect unity, perfect harmony, and perfect truth; while its constant activity brings perfect balance, perfect growth, and perfect understanding.