xiù caí bù chū mén, néng zhī tiān xià shì
秀 才 不 出 门， 能 知 天 下 事

Without even stepping outside his gate the scholar knows all the wide world's affairs.

翻译 ( paraphrase )
秀才不必走出家门，就能够知道世界上的许多事情。
这条谚语告诉我们：书本是知识的宝库。人只要多读书，即使没有外出，也能从书本上获得许多有用的知识。

This proverb reminds us that books are treasure-houses of knowledge. If one reads a lot, he can learn a great deal of useful knowledge without bothering to seek it in the wide world.

秀才：中国明朝和清朝时候，通过最低一级考试合格的读书人。后来用来泛指有学问的读书人。
         One who passed the imperial examination at county level in the Ming and Qing                      dynasties. Later it came to be used to refer to scholars in general.

同义词 ( synonym )
秀才不出门，全知天下事。

造句 ( example )
好好在家看书吧，正所谓“秀才不出门，能知天下事”，书本可是好东西啊！