"You have the power to heal yourself" Do you believe when you accept and live with this teaching, that you?

I believe that I am always connected to the Divine; but it helps me down here in 3-D consciousness if I believe that consciously. And according to the depth of belief and the absence of blocking beliefs, will healing happen for me.

The crucial point is "the absence of blocking beliefs" - that means absence of active karma; and much of life's endeavours for the spiritual person can be in discovering and resolving karma, to get clear enough to have the healing that is one's natural birthright.

The body has a "blueprint" or pattern that keeps it formed, as a sort of "standing wave", while physical matter ingested passes through it. If the pattern is distorted by karma, then that distortion gets built into the physical. But if the pattern can remain as intended, or be returned to that state, the body will naturally "heal" itself.
And of course, that applies / resonates into the higher levels of being as well. So I believe.

Healing is a physiological process that occurs on the cellular level. It's not affected by, nor does it affect, anything that might be considered a soul.

Methinks someone has been reading some L. Ron Hubbard

Yes, of course. I have seen how visualizing, meditation and positive thinking can all have an effect on how fast and how well you heal. I believe that health is mind over matter. If you are constantly taking care of yourself, eating right and exercising and not poisoning your body, it will be fine unless something external damages it. Then your mind can take over and heal you if you believe it. If you don't it won't work because you won't even try. I've seen it happen.

It is not a divine process in the least. Bones and tendons will heal on their own without medical care, unfortunately, they will probably not heal well.

Yes because you are changing your personal vibration up to match that of your wished for state. The trouble most people have is keeping it there for the universe to do its part and change the whole of you which is includes the soul as your are an intergral part of.