Never memorize something that you can look up.

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About this quote

If you cling to details to feel competent, ask why and break the habit: memorize core principles, not trivia. Build a system of references and use freed time to practice real skills and solve harder problems.

When to use it

  • Studying for an exam: memorize key formulas and concepts, but keep data tables and dates in your notes to look up as needed.
  • Before a meeting: internalize your main message and where to find supporting numbers on your device instead of cramming every statistic.
  • At work: maintain a clear procedure folder so you spend brainpower on judgment and decisions, not recalling every step.
  • Learning a new tool: focus on patterns and workflows; look up exact commands or syntax when you need them rather than trying to memorize everything.