Our fatigue is often caused not by work, but by worry, frustration and resentment.
you can measure the size of a person by what makes him or her angry
Feeling sorry for yourself, and your present condition, is not only a waste of energy but the worst habit you could possibly have.
Seventy per cent of all patients who come to physicians could cure themselves if they got rid of their fears and worries.
Much of the best work of the world has been done against seeming impossibilities.
If you act enthusiastic, you'll be enthusiastic!