There are ways to strengthen your body and ways to strengthen your mind. Practice strengthens both.
1.Two is one and one is none – always find at least another use for every piece of kit you have.
2.One way in, two ways out – Always find and use another method or route on the way back or onward.
3.Silence is thunder – always see the gaps as well as the signal and learn to pay attention to the shadow as well as the light.
The Martial Art of Walking 