After a whimsical dive into the world of nursery rhymes, I've emerged with a winner for the best life lesson - 'The Itsy Bitsy Spider'! This little arachnid, who just refuses to quit despite the downpours, teaches us about perseverance and resilience against all odds. You've got to hand it to the spider, folks, it's like the Rocky Balboa of nursery rhymes! So, next time life rains on your parade, channel your inner Itsy Bitsy Spider and climb right back up that waterspout! After all, if a pint-sized eight-legged creature can, why can't we, right?