Just as there exists a very fine line between brilliance and insanity, there also exists a fine line between passion and many negative traits such as narrow-mindedness, narcissism, fanaticism, delusion, and even paranoia.

FORBES: Passion: Leadership Asset or Liability?

An expert bridge player, he doesn't share his dad's passion for architecture--though he recognizes its effect on the bottom line.

FORBES: Second Empire

An expert bridge player, he doesn't share his dad's passion for architecture--though he recognizes its impact on the bottom line.

FORBES: Second Empire

The bottom line: The major you choose must match your inner capabilities and your passion with unique market opportunities.

FORBES: How To Choose The Right College Major

The bottom line: To achieve great things, you must posses the creative power of Eros, the passion for the good and beautiful the new and the exotic, the perfect and the immortal, the source of all our happiness.

FORBES: The Creative Power Of Eros

That means they may show great insights into a new technology that has marginal business value, their passion may motivate team members more than customers, or they may allow themselves to be pulled over the ethical line in their success drive.

FORBES: 7 Ways to Grow from a Smart to a Wise Entrepreneur