As the sun rose he saw other boats in toward shore, which was only a low green line on the sea.

恐惧可以是一个有用的信号，但它不应该是我们唯一倾听的声音。

解释：不通过学习而能自己知道的，不去请教他人而能自己通晓的，从古到今没有这样的事。