A few years ago, I was chatting with a stranger in a bar. When I told him I was an economist, he said, "Ah. So... what are the Two Things about economics?"
"Huh?" I cleverly replied.
"You know, the Two Things. For every subject, there are really only two things you really need to know. Everything else is the application of those two things, or just not important."
"Oh," I said. "Okay, here are the Two Things about economics. One: Incentives matter. Two: There's no such thing as a free lunch."
(Source: http://www.csun.edu/~dgw61315/thetwothings.html)
Translation:
1. Be faithful to the original author and get his or her message across.
2. Be faithful to your reader and write so that he can understand.
Linguistics:
1. There is no such thing as a language "error".
2. Languages can be studied like any other field of science.
Skydiving:
1. Open your parachute.
2. Focus. (On your exit, on your freefall moves, on your landing.)
Graphic Design?
Electrical Engineering?
Flying helicopters?
Flying airplanes?
...?
Electrical Engineering :
RépondreEffacer1. V=R/i
2. Abide by murphy's law at all times
Flying Helicopters :
1. Keep the blue side up
2. Manage your engine power
Flying airplanes :
1. Conserver sa VIEtesse en tout temps
2. Be ahead of the aircraft