The symbol serves to express an idea, and is to be discarded once 
the idea has been understood.

Words serve to explain thoughts, and ought to be silenced once the 
thoughts have been absorbed ...

It is only those who can grasp the fish and discard the fishing net
that are qualified to seek the truth.

	- Tao-sheng, died A.D. 434 
		In Fung Yu-lan 
		*A Short History of Chinese Philosophy*
		1968, p. 253.