A model is a good model if first it interprets a wide range of observations in terms of a simple and elegant model, and second if the model makes definite predictions that can be tested, and possibly falsified, by observation.

There are too many accidents that can befall life on a single planet.

If I have questions about the universe on my mind when I go to bed, I can't turn off. I dream equations all night.

If we do discover a complete theory, it should be in time understandable in broad principle by everyone. Then we shall all, philosophers, scientists, and just ordinary people be able to take part in the discussion of why we and the universe exist.

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

Children in backseats cause accidents. Accidents in backseats cause children.

Because there is a law such as gravity, the Universe can and will create itself from nothing. Spontaneous creation is the reason there is something rather than nothing, why the Universe exists, why we exist. It is not necessary to invoke God to light the blue touch paper and set the Universe going.