Big? Sure. But, he can't catch mice! So for your big tree. No use? Then plant it in the wasteland - in emptiness. Walk idly around it and rest under it's shadow. No axe or saw prepares its end. No one will ever cut it down. Useless? You should worry!.
ZhuangziLook at this window: it is nothing but a hole in the wall, but because of it the whole room is full of light. So when the faculties are empty, the heart is full of light.
ZhuangziTo be constant is to be useful. To be useful is to realize one's true nature. Realization of one's true nature is happiness. When one reaches happiness, one is close to perfection.
Zhuangzi