Does anyone know what the moral of My Neighbor Totoro was?

If that you have enough belief, anything can happen...

Believe in dust bunnies and good things will happen.
LOL

I think the moral is to believe in what you like and it may come true... But, believe in yourself, and you can do anything you put your mind to.

So the real morale of the story is respect- Nature, the elderly, strangers, family, and for one's self. This is shown all throughout the movie. When you respect people, they will treat you well & will comfort you when you're down. Even if you don't want to like someone, you should still be kind. And finally, when you treat nature with respect, it will respect you back.