a) "I only have a short time to live because I'm 80, so I'll try to meet as many new people as I can."
b) "Now that I'm 80, I might as well withdraw from the world."
c) "What happens now doesn't matter, because, now that I'm 80, my best years have passed."
d) "What makes me happy now is my focus, because I'm 80 and I only have a short time to live."