You do not need to step out of your door to understand the ways of the world. You do not even need to look out of your window to perceive the way of the Tao.
The greater the distance you travel, the greater your understanding is diminished.
Therefore, the wise person: does not need to go out and yet he knows, does not need to see and yet he understands, does not strive and yet he succeeds.
(from Tao Te Ching, verse 47, translation by Robert Brookes)