Most people tend to underestimate themselves excessively. Many say, “Humility is the virtue,” perhaps influenced by social environment and education, but it’s more about recognizing mistakes and limitations than about one’s own potential. That is, self-judgment based on experience. Of course, there will be mistakes and limitations in the future that we haven’t yet encountered, but the possibilities and achievements will be just as numerous. If we assume the odds are about equal, then we shouldn’t need to underrate ourselves. Excessive self-confidence or showiness is a problem, but so is underconfidence. Too much or too little is called arrogance. In Christianity, it’s considered “sin.” - Joseph’s “just my thoughts”
The advice to concentrate on one thing instead of trying to excel at many is valid, as it’s also challenging to master a single skill. If you neglect the other essential background abilities necessary to enhance that one skill, you will be unable to overcome your limitations. For a top-level skill to thrive, the supporting average abilities for that skill must also develop concurrently. Concentration should not be an excuse to avoid or ignore what’s important. - Joseph’s “just my thoughts”