Thanks. I probably am. I will never not confuse the two because I imagine getting into a comfortable place and then having to march up the next hill to discover an even comfier place that you can't see from where you are. I also imagine the instability of placing a boulder at the top of a hill and the effort of pushing it up a hill to find a new resting spot.

I'm sure I can invert the sign of something being measured to make my mental model work again :D