“He who reigns within himself and rules his passions, desires, and fears is more than a king.”
~ John Milton (1608-1674) English Poet
In life, we try to control many aspects of it that we actually cannot control. You should only focus on the things you can control, i.e., your passions, desires and fears. If you can learn to conquer this feat, then you will gain personal power, thusly achieving most anything that is within your ability.