The main satisfaction we're getting is the intellectual excitement. For me, that's plenty. Isn't that really the driving force of science?

Fear is a driving force for most of the things that I do. I don't know if that's healthy.

Water is the driving force of all nature.

This was a modest but not insignificant deal which could be a driving force to make real cuts in agricultural subsidies.

When you want it, where you want it. That's a powerful driving force.

Arsenal have really missed Patrick's driving force in midfield, and they haven't replaced him. They still look lightweight in midfield and keep on dropping points in the league.