Paddy The Beaver in "Paddy Plans A House"

"There mustn't be the least chance that the ice will ever get thick enough too close up my doorway, said he, "and I'm sure it never will here. I must make the foundations strong and the walls thick. I must have plenty of mud to plaster with, and inside, up above the water, I must have the snuggest, warmest room where I can sleep in comfort. This is the place to build it, and it is high time I was at work."
With that Paddy swam over to the place where he had cut the trees for his dam, and his heart was light, for he had long ago learned that the surest way to be happy is to be busy.