Genuine growth involves constantly pushing your boundaries, daring to try new things, and embracing the possibility of failure.

解释：砍伐树木不把树根砍掉，必能重新生长；堵塞水不把源头堵住，必会重新流出；消除祸患不铲除产生祸患的根基，祸患还会再生。

The division of labor is limited by the extent of the market.

The Lisp language is designed to be extensible, and it is easy to add new features to it.