Regardless of whether you are an entrepreneur or whether you are an employee of a large company, the absolute prerequisite is that you must know your stuff. There is no substitute for this.

...it will be a world made not bright but brighter, not clean but cleaner.

History not used is nothing, for all intellectual life is action, like practical life, and if you don't use the stuff - well, it might as well be dead.

When we look at chimpanzees . . . we get this extremely fine-grained view of evolution, and as a result we understand a lot more about the processes that are changing our own genome over time.

I only sleep with people I love, which is why I have insomnia.

It is not the end of joy that makes old age so sad, but the end of hope.

Liberty and personal independence in America are still a concept some here have never known.

By stealthily teaching dependence, photography can turn out to be dangerous.

Eros seizes and shakes my very soul like the wind on the mountain shaking ancient oaks.

Words may inspire, but only ACTION creates change. Most of us live our lives by accident - we live life as it happens. Fulfillment comes when we live our lives on purpose.

We're thrilled to join Google. With their support, Nest will be even better placed to build simple, thoughtful devices that make life easier at home, and that have a positive impact on the world.