“The Secret” was based on a 1910 book by Wallace Wattles:
When we realize this, we lose all doubt and fear, for we know that we can create what we want to create; we can get what we want to have, and can become what we want to be. . . . you must believe the three fundamental statements given previously in this chapter; and in order to emphasize them. I repeat them here:-
There is a thinking stuff from which all things are made, and which, in its original state, permeates, penetrates, and fills the interspaces of the universe.
A thought, in this substance, Produces the thing that is imaged by the thought.
Man can form things in his thought, and, by impressing his thought upon formless substance, can cause the thing he thinks about to be created.
You must lay aside all other concepts of the universe than this monistic one; and you must dwell upon this until it is fixed in your mind, and has become your habitual thought. Read these creed statements over and over again; fix every word upon your memory, and meditate upon them until you firmly believe what they say. If a doubt comes to you, cast it aside as a sin. Do not listen to arguments against this idea; do not go to churches or lectures where a contrary concept of things is taught or preached. Do not read magazines or books which teach a different idea; if you get mixed up in your faith, all your efforts will be in vain.
Do not ask why these things are true, nor speculate as to how they can be true; simply take them on trust.