Oscillations are everywhere

You have to keep oscillations present. You need a moment in the day, or in the week in which is a must to forget about your work.

You can neither work continuously forever, nor rest. Neither be happy forever, nor sad. Just be aware of the oscillations of our life. Think about this like a bow and arrow: you need to pull the bow string as much as you can, in order to push the arrow as far as you wish.

And the bow string keeps oscillating until it stops, so you need to pull it again. ;-)