Stress is caused by being "here" but wanting to be "there", or being in the present moment but wanting to be in the future. You can move fast, work fast, or run without projecting yourself into the future and without resisting the present. As you move, do it totally, enjoying the flow of energy at that moment. Or when you do nothing and the mind says "you should be working. You are wasting time" - observe the mind. Smile at it! ...
— Eckhart Tolle