A famous Viennese surgeon told his students that a surgeon needed two gifts:
freedom from nausea and the power of observation.
He then dipped a finger into some nauseating fluid and licked it, requesting each
of the students to do the same. They steeled themselves to it and managed it
without flinching.
With a smile, the surgeon then said, βGentlemen, I congratulate you on having
passed the first test. But not, unfortunately, the second, for not one of you
noticed that the finger I licked was not the one I dipped into the fluid.β
π