Would you agree that competence builds confidence? I believe that it does. In order for one to have confidence in what he/she does in life, there has to be a certain level of competence gained.
I have spent the last 19 plus years in the United States Army and have lived by a creed called “The NCO Creed”. Within this creed there is a line that goes “I will strive to remain technically and tactically proficient”. To me, that means that you will remain competent in the things that you do.
As you progress within either your life or your career, you don’t ever want to lose valuable skills that got you to the point that you are. You worked hard to gain those skills and become a subject matter expert within your field of expertise.
In other words, a competent and confident person who is capable of accomplishing whatever you are tasked with. To me this is the epitome of being a competent leader.