Two Kinds of Careful

If a knife is really sharp, you have to be very careful with the edge: it’s going to efficiently cut whatever it touches. If a knife is really dull, you have to be very careful with the pressure you’re exerting: it’s going to be difficult to stop if the blade slips off to one side or it suddenly plunges through.

The first kind of careful requires you to be attentive and skillful.

The second kind of careful demands much more of both.