10,000 hours rule. Your intelligence is flexible. You can improve and change. Show examples of people who didn’t start great. You can get better with deliberate effort.

There’s a lot of controversy around this rule but the lesson is important nonetheless.

“The 10,000-hours rule says that if you look at any kind of cognitively complex field, from playing chess to being a neurosurgeon, we see this incredibly consistent pattern that you cannot be good at that unless you practice for 10,000 hours, which is roughly 4 hours a day for 10 years.” -Malcolm Gladwell