The time between infancy and death, according to Rat in Pearls Before Swine, are your Big Space Years. He explains in this cartoon.
Goat asks, “How old are you, Rat?” He replies, “I’m in my big space years.” “What’s that s’pose to mean?” says Goat.
“When you’re really young, they put you in a tiny space called a bassinet. And when you die, they put you in a tiny space called a casket. And in between are the big space years,” explains Rat.
“Well, that’s a pleasant thought,” says Goat. “Enjoy the space while you can!!” shouts Rat.
Good advice! Enjoy every day in your big space years, and explore the world while you are outside the box.