I was reading a blog from Tony Robbins where he said we are either growing or dying. I guess in a sense we are doing both. Our bodies are dying, since the moment of birth. But in the in-between time from our birth to our death, we really can choose to grow or "die while alive."
Growth can be hard, even painful. When you get older, you just feel so tired of it all. Been there, done that, too damn tired to do it again. But if this keeps being your life motto, you soon find yourself dealing with depression and a loss of meaning and purpose to your life.
You're never too old to grow, or too tired, either. It might feel that way temporarily, so rest. But don't make resting state your default state, because that will lead to regrets later, when you look back and realize you did indeed have plenty of time and energy left to find new purpose, resurrect old dreams or create new ones, and give of yourself.
Growing as we die may sound paradoxical, but we can do both. We can continue to expand ourselves even as our bodies go toward an end point none of us can escape. It's what we do up until that end point that matters and as long as we are breathing, there's time and energy to spare.