Well, the 19th century made progress--the first progress after "ages and ages"--colossal progress. In what? Materialities. Prodigious acquisitions were made in things which add to the comfort of many and make life harder for as many more. But the addition to righteousness? Is that discoverable? I think not. The materialities were not invented in the interest of righteousness; that there is more righteousness in the world because of them than there, was before, is hardly demonstrable, I think.英文原著 · 《Letters Vol. 5》
In the solar spectrum, beyond the extreme red and extreme violet rays, are whole series of colours, demonstrable, but imperceptible to gross human vision. Such writing as this we have quoted renders visible the invisibilities of imaginative colour.英文原著 · 《Shelley》
Darwin's proposition that, 'many animal forms of life have been utterly lost, through which the early progenitors of birds were formerly connected with the early progenitors of the other vertebrate classes,' from the region of hypothesis to that of demonstrable fact.") The general appearance of the copy which you have sent me is worthy of its contents, and I can say nothing stronger than this.英文原著 · 《The Life and Letters-2》