Of seed-time or harvest, of the reapers bending over the corn, or the grape gatherers threading through the vines, of the grass in the orchard made white with broken blossoms or strewn with fallen fruit: of these we know nothing and can know nothing.
— from De Profundis by Oscar Wilde

"You admit that scepticism may be false, even though it has a thousand to one in its favor; for by its very principles you know nothing, and can know nothing, on the subjects to which its doubts extend?"
— from The Eclipse of Faith; Or, A Visit to a Religious Sceptic by Henry Rogers

Where that place is, or what it is like, we know not, and cannot know.
— from Town and Country Sermons by Charles Kingsley

The man who has not been a Free Mason, for instance, may accuse that ancient society of Free and Accepted Masons of sanctioning, or even perpetrating crimes, but all his accusations will go for nothing, if he has not been a Mason himself, for the very obvious reason that he knows nothing, and could know nothing of Masonry, from his own knowledge; and hence it is that we find Jesuit priests and Popish presses turning into ridicule, and not without some cause, many Protestant writers and Protestant newspapers for accusing them of things they know nothing at all about.
— from Auricular Confession and Popish Nunneries Volumes I. and II., Complete by William Hogan

There are no appointments to keeps no angry clients kicking because I can't make water run up-hill or make cast-iron do the work of tool-steel.
— from Darkness and Dawn by George Allan England

Of the origin of things we know nothing, and can know nothing.
— from Life and destiny by Felix Adler

Darwin and Virchow are representatives of this agnostic position; they held that we know nothing, and can know nothing, about the origin of the first organisms.
— from The Wonders of Life: A Popular Study of Biological Philosophy by Ernst Haeckel

They were afloat on the ocean, under every guarantee of safety; they were the property of private citizens, who knew nothing, and could know nothing, of the diplomatic disputes of the two countries.
— from The History of Cuba, vol. 2 by Willis Fletcher Johnson