Here your Blessed-self will find both books, Scientific Healing Affirmations (1925 Edition) and The Psychological Chart (1925 Edition) together, as originally published by Swami Yoganandaji.

Spiritual Power of Man's Word :

Man's word is Spirit in man. Words are sounds occasioned by the vibrations of thoughts. Thoughts are vibrations sent forth by the Ego or Soul. Every word that leaves your mouth ought to be potent with your genuine soul vibration. Words in most people are lifeless because they are automatically put forth into the ether, without being impregnated with soul force. Too much talking, exaggeration or falsehood used in connection with words is just like shooting bullets out of a toy gun, without the gun-powder. That is why the prayers or words of such people do not produce any desired definite change in the order of things. Every word you utter you must mean it, i.e., every word...