two-word masterpieces

I was struck this evening by a commercial on TV. I think it was for a mortgage company. The theme throughout its running was the use of a simple prop: a two-word "sign-on-a-stick" jammed in the ground on the properties that represented the land attainable by their financing. It got me thinking. I asked myself, "What two-word phrase packs a whallop and expresses a profound truth?" I came up with, "Live simply." (I think that's profound.) So I'm wondering what other blog readers can offer as true conventional (or unconventional) wisdom. Please comment to this post with your own two-word wonders. I look forward to reading them...