What does this quote mean?

“Pragmatism unstiffens all our theories, limbers them up and sets each one at work.”

James presents pragmatism as a method that makes theories answer to practical consequences and experience instead of allowing abstract formulations to remain rigid and self-sufficient.

Source note: Pragmatism, Lecture II, “What Pragmatism Means”; Project Gutenberg #5116. The sentence follows James’s claim that theories become instruments rather than final answers.

“Knowledge comes, but wisdom lingers.”

Facts can be acquired quickly, while judgment develops more slowly through reflection and experience.

Source note: Poem “Locksley Hall”; the contrast distinguishes readily acquired knowledge from the slower development of judgment and wisdom.

“A little learning is a dangerous thing.”

Partial knowledge can produce misplaced confidence; the warning favors deeper study over shallow certainty.

Source note: An Essay on Criticism, Part II; Pope warns that shallow learning can produce premature confidence before deeper study tempers judgment.

“They teach us quite as much as we teach them.”

Education is reciprocal: adults may guide children, but close attention to children also teaches adults patience, perspective, honesty, and better ways of understanding growth.

Source note: Little Men; the observation describes the mutual education taking place in the Plumfield household and school rather than a one-way transfer of knowledge.

“Our errors are surely not such awfully solemn things.”

James resists treating every possible intellectual mistake as catastrophic, because an excessive fear of error can itself prevent inquiry, experience and the possibility of gaining truth.

Source note: The Will to Believe, essay “The Will to Believe”; Project Gutenberg #26659. James is contrasting the risk of being mistaken with the cost of refusing every uncertain intellectual venture.

“You can’t yourself, but exterior influences can do it.”

The Old Man claims that opinions can change, but attributes the change to new evidence, conversation, study, and other influences entering from outside the individual.

Source note: What Is Man?, Old Man replying to the Young Man’s question about changing an automatic opinion; this is dialogic determinism, not neutral cognitive science.