"Life in a certain sense is a sack of chemical reactions.
Thats one to look at it. Another is to say that it is an entity
that is compartmentalized, energy dissipating, adaptive,
and self-replacating. A third way of looking at it is to say
it's a network of catalytic reactions and amazingly it
replacates it's self. But I haven't said anything yet.
I've just given names to things I don't understand."
-George Whitesides