What is the quote during vietnam that said something about lending your neighbor a bucket of water?

Question

I remember it was said by some president, and it went like "If your neighbor's house was on fire, would you lend them a bucket of water" to help explain why we were interested in foreign affairs, namely imperialism.

Answer 1

I think it originated with FDR, rationalizing his lend-lease policy. "If your neighbor's house was on fire, and threatened your own property, wouldn't you lend him a hose?"