I CAN/WILL DO THIS(?/!)

"Energy and persistence alter all things."

Benjamin Franklin

18th century American statesman/scientist/philosopher

Pretty ambitious to say "all" things but I can easily imagine many to most.

When planning new ventures do you take your energy and ability to persevere into account?

You should.

Improvement: The Quest to be Best

"It is not by muscle, speed, or physical dexterity that great things are achieved, but by reflection, force of character, and judgment."

Marcus Tullius Cicero
First Century BC Roman Statesman

Well I have to think that being a world class sprinter does require muscle, speed and at least some physical dexterity; however I also believe that the business equivalents (most money, best people, best product) can and often are trumped by smaller, more nimble companies with greater desire, focus and energy.

It comes down to continually looking for ways to improve and never is that more necessary than when you are the leader.