Resistance keeps us alive. Resistance causes us to fail. We feel it when we stretch our fingers in front of the fire. We also feel it when we think of something unpleasant we would rather not do. Yet, funnily enough, both the necessary and the unnecessary resistance have the same word to describe it.
Science gives one definition of it. We can calculate it – even that on our own skin. It is a tangible and real thing, quantified by a unit named after a German man who devoted his life to learning all about it. We know it and we need it sometimes, but at other times it is a nuisance. Resistance is useful when we try to move, but also causes losses in a conducting wire. Like nature, it is both good and evil.