Gandalf's a good guy, and it's a good part. He says the right things, he believes the right things. An actor can have fun with it.
You always think that 70 is the end of the road: 'Somebody died when they were 73; good life'. You're closer to death, and you better make sure you don't waste too much of your time doing things you don't want to do. No point in saying things you don't believe in.
Before acting, I wanted to become a journalist. I also toyed with the idea of being a chef - but that's only when people asked me what I wanted to be. In fact, I always used to say I wanted to be an actor, but I didn't ever believe that I was good enough to be come one.