A Charlie Munger quote from Poor Charlie’s Almanack,

If you’re going to be an investor, you’re going to make some investments where you don’t have all the experience you need. But if you keep trying to get a little better over time, you’ll start to make investments that are virtually certain to have a good outcome. The keys are discipline, hard work, and practice. It’s like playing golf—you have to work on it.

If you don’t keep learning, other people will pass you by.