Screwing up is a great way to find out that your assumptions were wrong or that your model of the world was a little bit off. As long as you update your model and move forward with a better picture, you’re doing it right.

[…]

There are still some bad ways to fail. Repeating the same mistake over and over is one. Not listening to customers or peers before or after a failure is another. Never ignore the evidence; particularly when it says you’re wrong.

– Valve Handbook for new employees.