You can change everything you know, and you can change everything you can believe.
Knowledge is external. You know by looking, you know by reading, you know by tasting, hearing, you know by learning.
Believing is internal. You don’t know what you believe. Nobody can tell you. Just your experience. You believe you learn from experience, and you are waiting for the experience to happen, so you (can) learn.
Believing is internal. It is your spectrum to filter “experience” – which is actually feeling. You can not change what you are feeling … yet, do you know your feelings? Who told them to you?
You are more inclined to change either what you are believing, or what you know, depending on who you are, and what your preference is.
Yes, it’s about preferences. You choose to decide, YOU create “experience”.
If you feel that what you know is more easily changeable than what you believe, go change what you know. “Meet” “different” “experiences” – read another book. And modify what you think you know.
If you feel like what you believe is easier to change, that is up to you to change, that you “are in control”, go change what you believe. Ask the question “what I believe in?” or simply create different emotions that you are “experiencing” regularly.
Is it difficult? Is it challenging? It may be. Knowing – and Believing – in having the choice, in honoring your preference, in doing things your way, will make it less difficult, more challenging, and infinitely more meaningful and fulfilling.
Tell me who you are that we don’t know.

