I think that age as a number is not nearly as important as health. You can be in poor health and be pretty miserable at 40 or 50. If you're in good health, you can enjoy things into your 80s. ↗
I still sweat bullets if I go on The Tonight Show, but I tell myself, You can either have fun tonight or you can be shy and miserable. You ask my friends or anyone I work with now - nobody would say I was shy. ↗
One morning, about four o'clock, I was driving my car just about as fast as I could. I thought, Why am I out this time of night? I was miserable, and it came to me: I'm falling in love with somebody I have no right to fall in love with. ↗
I can't deal with actors! I can't deal with myself. We're neurotic and miserable ... I love doing what I'm doing, but while I'm doing it, I'm miserable. ↗