learn one's lesson
Profit from experience, especially an unhappy one. For example, From now on she'd read the instructions first; she'd learned her lesson. Also see hard way.
Learn A Valuable Lesson From These QuotesFrom student to teacher, the value of education is indescribable. These quotes show the power and reach of learning and education.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.