What it is fixed upon

The most important thing about you: your mind. Not your brain, but your mind. You are, more than anything else, a mind. That is what makes you precious in a special way. Categorizing people and treating them in specific ways just because of their bodily features violates the central worth of the person as a mind. The body is important, but the mind is all-important. And the most important thing about your mind is what it is fixed upon.

Dallas Willard