Quote by Sylvester Stallone
"I think the key to longevity is to keep challenging yourself."
More from Sylvester Stallone
"It ain't about how hard you hit. It's about how hard you can get hit and keep moving forward."
"The world ain't all sunshine and rainbows. It's a very mean and nasty place."
"Going in one more round when you don't think you can, that's what makes all the difference."
"I am not the smartest or most talented person in the room, but I succeeded because I keep going."