What is the most iimprtant statement we can pass on?

If, in some cataclysm, all scientific knowledge were to be destroyed, and only one sentence passed on to the next generation of creatures, what statement would contain the most information in the fewest words? 

Feynman puts it like this; 'I believe it is the atomic hypothesis (or atomic fact, or whatever you wish to call it) that all things are made of atoms.'