The world is full of stories, but it's the ones we choose to tell that define us.

What is the difference between a Turing machine and the modern computer? It's the same as that between Hillary's ascent of Everest and the establishment of a Hilton hotel on its peak.

"Quantum cryptography is not about keeping secrets, it's about knowing when someone is trying to steal them."

In the midst of winter, I found there was, within me, an invincible summer.

The only way to understand another culture is to assume the frame of reference of that culture.