The trick, these fellow travelers tell me, is to accept the not knowing and find your equilibrium in that new gravity. Calm the mind. Find your balance out on the cold planet, whether or not you know the next step, or the date of the next appointment, or what good or bad news the Technetium-99 isotopes floating around in your blood during the last scan reveal.

You must be at peace with not knowing, they tell me. That is how you get through outer space, and find your way back home.

http://boingboing.net/2011/12/09/the-diagnosis.html