Quality is more important than quantity. One home run is much better than two doubles.

解析：通过实践磨练自己。

I'm the reason your pain won't stop.

你读得越多，知道的事情就越多。你学得越多，去的地方就越多。

人们生产生活资料的方式首先取决于他们发现并必须再生产的实际手段的性质。