OK... as an example then, desire for stimulation = 'fear' (repulsion) toward ennui, meaninglessness, emptiness, that sort of thing.
A movement toward something that is simultaneously a movement away from something else.
Seeking of pleasure = avoidance of pain.
Two poles to the mind, which works in opposites.
P.S. I know this stuff has little to do with the original post, sorry... IMO, personal regrets and such are a holding on to the past, which is gone. Why regret something that literally doesn't exist any more (except as memory)?