They wish to build a new and better world, and I would be glad if they could succeed, and if I saw any hope of success I would join them. I ask for their plans, and they offer me vague dreams, in which as a man of affairs, I see no practicality. Is is like the the end of Das Rheingold: there is Valhalla, very beautiful, but only a rainbow bridge on which to get to it, and while the gods ma be able to walk on a rainbow, my investors and working people cannot.

In my day job, I worry non-stop about making wise investments for long-term gains.

Mathematical fame, if you have the cash to pay for it, is one of the soundest and steadiest of investments.

NASA has been one of the most successful public investments in motivating students to do well and achieve all they can achieve. It’s sad that we are turning the programme in a direction where it will reduce the amount of motivation and stimulation it provides to young people.