According to inflation, the more than 100 billion galaxies, sparkling throughout space like heavenly diamonds, are nothing but quantum mechanics writ large across the sky. To me, this realization is one of the greatest wonders of the modern scientific age.

Sometimes nature guards her secrets with the unbreakable grip of physical law. Sometimes the true nature of reality beckons from just beyond the horizon.

Energy is the ultimate convertable currency.

I can assure you that no string theorist would be interested in working on string theory if it were somehow permanently beyond testability. That would no longer be doing science.

I’ve spent something like 17 years working on a theory for which there is essentially no direct experimental support.

Most scientists like to operate in the context of economy. If you don't need an explanatory principle, don't invoke it.

...things are the way they are in our universe because if they weren't, we wouldn't be here to notice.