Give a soldier an anvil, just a hunk of metal, and drive him out into the desert and leave him. In two weeks – when you go to get him, the anvil will be broken. — Creighton Abrams

My Take – Your equipment, be it a gun, a vehicle, or a computer, should be tough enough to do what you need it to do.  You need to be able to depend on your gear to work right the first time, every time.  That being said, you need to know how to maintain it and be able to get it into working order when it inevitably breaks.  If you don’t know how to check the oil of your car, you shouldn’t be driving it.  If you can’t do malfunction drills on your gun, don’t depend on it to protect your life.  If you don’t know how to patch and protect your computer, shut it off and go read a book.   Remember, everything made by mortal hands will break, and usually when you need it the most.  The trick is to be prepared when it happens.