There is a good Micheal Chricton interview somewhere out there where he says meaning is just a post facto story we learn to cook up over time. You ask a 5 year old WHY they want a particular thing and all you will get is BECAUSE. Over time that 5 year old realizes he better come up with a good story people want to hear cause everyone keeps bringing up this WHY question for every other action he takes.
There is no why there is just the fact that you want chocolate ice cream right now or you want to climb that mountain or save the world. The why part is just a story you need when others look at you quizzically.
Find the things that are in your nature. Do it to the best of your ability.
That's how things like the Taj Mahal get built. It's not just about instant gratification.
from Wittgenstein's Philosophical Investigations ยง217: 'If I have exhausted the justifications, I have reached bedrock and my spade is turned. Then I am inclined to say: "This is simply what I do."'