“When we've got a common philosophy and a common objective; then we can advance in open order. We shall be a great team. But we've got to make sure of that common set of ideas. Maybe we shall find our formulae difficult for some of these new types. If we keep our minds open, we may find that they are right and that our formulae have to be modified. Probably -- it's a thought that shouldn't dishearten us -- but probably we don't know everything.”