In the time of force, some will get boosted, some other will get frustrated. These two kinds of effect come from the same thing which is expectation. Some can handle the process to gain the expectation as what we wish to be, that is why the force boosts them to work harder. But, for some other people, expectation will give them more pressure which will lead them to stress and wish less and all will be just ruined also out of plan.
It might be said as theory, what theory? I don’t know, it is just out of my head. –ifa-