I don't think the human race will survive the next thousand years, unless we spread into space.

The more you learn, the more you know. The more you know, the more you forget. The more you forget, the less you know. So why bother to learn.

God abhors a naked singularity.

In effect, we have redefined the task of science to be the discovery of laws that will enable us to predict events up to the limits set by the uncertainty principle.

My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all.

I put a lot of effort into writing 'A Briefer History' at a time when I was critically ill with pneumonia because I think that it's important for scientists to explain their work, particularly in cosmology. This now answers many questions once asked of religion.

So remember to look up at the stars and not down at your feet. Try to make sense of what you see and hold on to that childlike wonder about what makes the universe exist.