Your work is going to fill a large part of your life and the only way to be truly satisfied is to do what you believe is great work. And the only way to do great work is to love what you do. If you haven't found it yet keep looking. Don't settle. As with all matters of the heart you'll know when you find it.
We still live with this unbelievable threat over our heads of nuclear war. I mean are we stupid? Do we think that the nuclear threat has gone that the nuclear destruction of the planet is not imminent? It's a delusion to think it's gone away.