He lives by his subtile income .

他靠微薄的收入生活。

Histories make wise ; poets witty ; the mathematics subtile ; natural philosophy deep ; moral grave ; logic and rhetoric able to contend .

读史使人明智，读诗使人灵秀，数学使人周密，科学使人深刻，伦理使人庄重，逻辑修辞学使人善辩。

Histories make men wise ; poems nitty ; the mathematics subtile ; natural philosophy deep ; moral grave ; logic and rhetoric able to contend .

历史使人明智，诗歌使人聪慧，数学使人精密，哲学使人深刻，伦理学使人有修养，逻辑与修辞使人善辩。

Histories make men wise ; poems witty ; the mathematics subtile ; natural philosophy deep ; moral grave ; logic and rhetoric able to contend .

读书使人明智，读诗使人灵秀，数学使人周密，科学使人深刻，伦理学使人庄重，逻辑修辞学使人善辩。

Istories make men wise ; poems nitty ; the mathematics subtile ; natural philosophy deep ; moral grave ; logic and rhetoric able to contend .

历史使人明智，诗歌使人聪慧，数学使人精密，哲理使人深刻，伦理学使人有修养，逻辑与修辞使人善辩。