What is the impact of self-confidence, motivation and ambition on a person's ability to earn income?

In Anderson v. Miner [1999] B.C.J. No. 4 at paragraph 18 of that decision the quote captures the considerations that are apposite in this case. There is, in my respectful view, more to the capital asset of capacity to earn income than the physical and intellectual components argued for by counsel for the defendants. Physical and intellectual abilities may not amount to very much without self-confidence, motivation and ambition. Many people fail to achieve the potential their natural gifts would suggest because they lack self-esteem, have low social drive, and find themselves unwilling or unable to risk the chance of failure.