The body has a wonderful capacity of adaptation and endurance. It is able to do so many more things than one usually imagines. If, instead of the ignorant and despotic masters that now govern it, it is ruled by the central truth of the being, you will be amazed at what it is capable of doing. Calm and quiet, strong and poised, at every minute it will be able to put forth the effort that is demanded of it, for it will have learnt to find rest in action and to recuperate, through contact with the universal forces, the energies it expends consciously and usefully.
Ref: On Education