Meaning of “He who knows only his own side of…”

Of Studies, in Bacon’s instructions for how different kinds of books should be read.

The Advancement of Learning, First Book, Project Gutenberg #5500, transcribed from the 1893 Cassell & Company edition. Bacon contrasts impatience of doubt with mature suspension of judgment and then sets out two ways of contemplation before saying that beginning with certainties ends in doubts while beginning with doubts can end in certainties. It remains early-modern epistemological argument rather than a modern experimental rule for scientific method.

Analects 2:15 in James Legge’s translation; the saying balances study with independent reflection.

The Vanity of Human Wishes (1749), first-edition scholar passage, Wikisource scan leaf 28. “And pause awhile from Learning to be wise” turns from the ambitious student’s pursuit of knowledge toward Johnson’s satirical warning that learning does not by itself remove grief, danger or error. This is eighteenth-century moral-satirical poetry after Juvenal, not a modern educational rule.

The Art of Literature, section “On Thinking for Oneself,” T. Bailey Saunders translation; Project Gutenberg #10714. The preceding sentence says a person must first learn something before turning it over in the mind.

Common Sense (1776), Introduction. The represented opening sentence is verified in Project Gutenberg #147 and the validated scan-backed Wikisource transcription; Paine argues that familiarity can make a wrong practice appear right before public argument unsettles the custom.