The ignorant think all things wrong which they cannot understand.

The saying criticizes rejecting an idea merely because one lacks the knowledge or ability to understand it. It treats such rejection as a limit in the observer’s understanding, not as proof that the idea itself is mistaken; its label for people can sound insulting when applied directly.

It cautions against hasty, self-assured judgment of what is unfamiliar or complex. It does not mean that every claim one cannot understand is true: skepticism remains appropriate when it rests on identifiable reasons or evidence rather than unfamiliarity alone.

Use it to reflect on dismissive reactions to unfamiliar knowledge, methods, beliefs, or art, especially when no actual error is identified. Because its wording calls people ignorant, avoid directing it at a specific person; it is better suited to general reflection or self-criticism.