"I commit myself to using my external reality as a canvass for expressing my internal reality."

That line to me expresses the interlink between the two mirrors... that of The Creator and The Created. If more people navigated their lives by paying more attention to the input/output system that this dynamic entails, people would make better decisions in terms of how they navigate their lives, and would optimize the probability of reaching their goals.

Why? - Because they will then find themselves being more in line with doing activities their Creator created them to do and they then have the momentum of the universe.

My point is, a number of querents ask me how to optimize their lives for desirable outcomes without having sufficient awareness of what they are 'inputting' that is leading them to get undesirable 'outputs'. So if one can generate 'inputs' into the Matrix that is in line with their Greater Will/purpose for existence/reason why they were Created by The Creator... that is how they evoke having the momentum of the universe behind their actions.