I think that, with age, people come to realize that death is inevitable. And we need to learn to face it with serenity, wisdom and resignation. Death often frees us from a lot of senseless sufferings.
Happiness is this place that, once you arrive there, you have nothing else to do. You get bored. Passion is this up and down; it's like a rollercoaster, you know, and much more interesting to me.