Any business plan won't survive its first encounter with reality. The reality will always be different. It will never be the plan.

Teachers, who are really good create that environment where you can be very satisfied by the process of learning. If you do something and you find it a very satisfying experience then you want to do more of it. The great teachers somehow convey in their very attitude and their words and their actions and everything they do that this is an important thing you're learning. You end up wanting to do more of it and more of it and more of it. That's a real talent some people have to convey the importance of that and to reflect it back to the students.

The world is littered with corpses that predicted technology in a particular arena was done. If there's another gigantic step change out there, we don't yet know what it is.

I like having the digital camera on my smart phone, but I also like having a dedicated camera for when I want to take real pictures.

If you decide that you're going to do only the things you know are going to work, you're going to leave a lot of opportunity on the table.

Mediocre theoretical physicists make no progress. They spend all their time understanding other people's progress.

There are multiple ways to be externally focused that are very successful. You can be customer-focused or competitor-focused. Some people are internally focused, and if they reach critical mass, they can tip the whole company.