You have to find the intersection of doing something you're passionate about and that, at the same time, is in the service of other people. I would argue if you don't find that intersection, you're not going to be very happy.

I don't view Apple or myself as an activist. What we do is for some things where we think we have deep knowledge, or think we do, or a strong point of view, we're not shy. We'll stand up, speak out - even when our voice shakes.

We see that in the top problems in the world between haves and have-nots, generally we find that the root cause is education.

Tim Cook Quotes