The toughest teacher you had is often the one whose lessons you’re still using years later.

Demanding teachers age well. At the time their standards feel personal and unreasonable, and years later you notice you still work the way they insisted on, largely because they refused the version you wanted to hand in. Comfort teaches very little. Being held to something is unpleasant in the moment and durable afterwards.

Think of the toughest teacher or coach you have had and name one thing you still do their way. Then look at whoever is holding you to a standard right now. Take the note properly instead of waiting years to agree with it.