If you persist in trying to attain what is never attained (It is Tao's gift), if you persist in making effort to obtain what effort cannot get, if you persist in reasoning about what cannot be understood, you will be destroyed by the very thing you seek. To know when to stop, to know when you can get no further by your own action, this is the right beginning!
ZhuangziThe fish trap exists because of the fish. Once you've gotten the fish you can forget the trap. The rabbit snare exists because of the rabbit. Once you've gotten the rabbit, you can forget the snare. Words exist because of meaning. Once you've gotten the meaning, you can forget the words. Where can I find a man who has forgotten words so I can talk with him?
ZhuangziHeaven cannot but be high. Earth cannot but be broad. The sun and moon cannot but revolve. All creation cannot but flourish. To do so is their TAO. But it is not from extensive study that this may be known, nor by dialectical skill that his may be made clear. The true sage will have none of these.
Zhuangzi