Gotta go with hope... it's what separates humans from the rest of the critters.
Actually, I've got the word Hope subliminally hidden in my hallway so every day when we go out the front door your brain registers it... even if your eyeballs don't.
Yes, yes I have been accused of being mad... but I'm quick so those white coated fellas haven't caught me yet.
Mine is "innovation". As life runs due to innovation and without it life hangs. Life stopped in its absence. Innovations give force the lives and motivates people to live and do more innovations.