If you can't explain it simply, you don't understand it well enough.

Share this quote

About this quote

Stop hiding gaps behind jargon or long-winded sentences; clarity shows real mastery. Force yourself to break ideas into plain steps, ask the hard questions, and teach what you claim to know. Make simplification a habit—it's the quickest way to expose and fix weak understanding.

When to use it

  • In a team meeting, ask a colleague to sum up their plan in one sentence—if they can't, push them to clarify before you sign off.
  • When studying, try teaching the concept to a friend in plain terms; if you stumble, you know what to study next.
  • Before a presentation, rewrite your main point so a non-expert can repeat it back; that reveals what you actually grasp.
  • During code review, demand a simple explanation of the algorithm; vague answers mean the design needs work.