This is from: 'A Handful of Zen' by Camden Benares

The Path

A Taoist teacher asked her student to accompany her on a hike. The
teacher, with her student at her side, walked to the foot of a small
mountain
and started up the path that led to the top. About halfway up, she
stopped and asked her student, "Which way is up?" He pointed up. She
asked, "which way is down?" He pointed down. She said, "The same
path takes you up and down. That is the unity of opposites. If you again
tell me that you don't understand the unity of opposites, I will tell you to
take a hike."

So simple, so true and made me laugh, I do that alot here.