"If your mind is always busy then you have no sense of the world you live in. Because there is no communication, there is no space within which to see what we are doing. We will end up destroying our lives, and you may not realize what you have given up until you are on your deathbed. By being busy you are basically giving away your human existence.

One of the things about being busy is that it is a un-examined behavior. It’s habitual."

from Buddhism vs. Speed: Busyness is Laziness