I ran a half-marathon three weeks ago. My body evidently doesn’t care about that one bit because after taking a little break, I got back to running and felt the muscle soreness after 3 fast miles. Now we are very aware of this effect when it comes to things we don’t want: losing muscle, fat creeping back in or starting to forget things. Yet we can use the same logic when it comes to other things: the brain patterns that are destructive but underused diminish in tiny ways every day. So let’s use this naturally occurring change as motivation.