You simply cannot give to the world all that you have to give to the world if you do not remain true to your own "selfish" desires. You have a unique set of precious values that can only be fulfilled by pursuing what drives you the most: your passions and dreams. Could Thomas Edison have tended to the downtrodden as Mother Teresa did? Could Albert Einstein have preached salvation as Martin Luther King Jr. did? Could Abraham Lincoln have built cars like Henry Ford? Always, the masses benefit from the individuals who insist on marching to the beat of their own drummer.