Building your competence boosts your confidence…and confidence is a close friend to high achievers. Building your competence is like cleaning your house. If you stop cleaning, dust collects. The need to clean never ends. To achieve the success you deserve, you need to find ways to be constantly improving. The task of building competence never ends.
Competence includes anything that improves your ability to perform–your knowledge, skills, relationships, resourcefulness, processes, systems, and information.
https://www.inc.com/lee-colan/8-ways-to-be-constantly-improving.html