As areas of knowledge grow, so too do the perimeters of ignorance.

My view is that if your philosophy is not unsettled daily then you are blind to all the universe has to offer.

But to measure cause and effect... you must ensure that a simple correlation, however tempting it may be, is not mistaken for a cause. In the 1990s the stork population of Germany increased and the German at-home birth rate rose as well. Shall we credit storks for airlifting the babies?

I think if everyone had the luxury to pursue a life of exactly what they love, we would all be ranked as visionaries and brilliant.

The Earth is just one place of many that we could hang our hats.

So not enough people in this world, I think, carry a cosmic perspective with them. It could be life-changing.

If we have the power to turn another planet into Earth, then we have the power to turn Earth back into Earth.