Excess bias on the analytical, thinking, and "doing" sides of a human life purges out the practical, hands-on, "not-doing" side that's deeply rooted to nature and connects you to reality. You need to spend time in the nature doing nothing to realize where you come from and that you're not in hurry to anywhere and to balance, you also need to exercise your brain and thinking to break the limits of what you can, thus redefining yourself as you go by life.