"If Mr. Einstein doesn't like the natural laws of the universe, let him go back to where he came from"

In this quote, Robert Benchley is making a sarcastic remark about the popular physicist Albert Einstein. He is implying that Einstein, who is known for his revolutionary theories on the laws of the universe, is not satisfied with the natural laws and should go back to his location of origin. This declaration is implied to be amusing and highlights the absurdity of recommending that somebody can just go back to where they originated from if they don't like something. It also satirizes the idea that Einstein, a brilliant mind, would have any concerns with the laws of deep space. In general, Benchley is utilizing wit and paradox to make a lighthearted jab at Einstein's intelligence and the concept of being able to change the laws of nature.