But foolishness when young can be much more fun.
I agree. I wish I could enjoy the same foolishness and fun as I get older. But I think I would be the last one who wishes to keep himself out of the range of foolishness. Would you then call me a man poor in spirit? (I’m kidding) 
I think you guys are getting foolishness and fun mixed up. Fun can seem foolish, but it’s not. Foolishness is often definitely not fun, especially when it lands you in jail or results in some government policy that screws up people’s lives.