I don't see a candidate on the scene right now, but it is going to have to be a candidate that people can look at as a leader and not as a man or a woman.
Physics is nothing but the ABC's. Nature is an equation with an unknown, a Hebrew word which is written only with consonants to which reason has to add the dots.
That's the way I work and one day I won't have the energy to do it, so I think it's always good to make the most of your life and living as much as possible.