I am not sure if Charlie Brown and Snoopy ever had this conversation as I never hung out with them outside of the comics. It does denote a very interesting point.
Charlie Brown in this picture represents a lot of people, especially as the years creep by. They become jaded with all the injustice they face and even experience. Then as the end becomes ever near they resign themselves to the fact it’s almost over.
Snoopy on the other hand, represents not only dogs of all kinds, but youth as well. Every day is a new adventure. Life has a flavor that can fade with age. We need to find that spark again!!!
As the days pass from one to another remember that each day holds its own possibility, no matter how close to the end it may be. A sure way to do this is to remain present. Enjoy each day for what it offers us.