The BitCoin general ledger is called the block chain. It is remarkably secure. To break into the chain, you would have to amass 25,000 of the world's fastest supercomputers. That seems completely infeasible.

Machines are pushing people to new frontiers, and teach us that complacency and the status-quo are not working.

Art is hardwired into our DNA; we've been making it for at least 50,000 years. It's almost magic – it has a mysterious power over us when we look at it and connect to it. Art connects directly with our emotions; it can move us and help us understand our place in the world. Art, literally is part of who we are.

Humans haven't been able to survive in any of our environments 'raw' – we've made fire, made shoes, made hunting tools… we've never had to experience being adapted to an environment 'as it is,' and so there's no sensible definition of people without technology.

At some point, while working on the rotation routine, I was watching a piece rotate on the screen. It was then that the idea struck me—the game could be played in real-time. That was the very first important 'aha' moment for Tetris.

If you have a bottle of water in your house, it belongs to you. Nobody can touch it without your permission, nobody can get into your house without your permission. This doesn't apply to the internet world. Facebook can access your room and your house without your consent. They can tear down your house, they can delete and block your digital life.

The guards hung me by my wrists from the ceiling for eight days…. After a few days of hanging, being denied sleep, it felt like my brain stopped working. I was imagining things. My feet got swollen on the third day. I felt pain that I have never felt in my entire life.

We have to honour all parts of ourselves; and the wellness, social-media, and culture of the modern world has encouraged us to be this faux-perfect… a virtuous, pure version of ourselves. Everyone has dark thoughts and demons… we can't suppress that and ignore it. If we do, we'll never heal.

Rich, sometimes you treat a wisp of intuition as though it were a four-lane highway. It's not that you shouldn't trust intuition — it's that you need to validate it.

It is this sense of democracy which empowers us, the people of Brazil, to elect someone like Lula who- in turn- uses that same democratic power to pursue policies to successfully combat inequality. This then reflects on the psychology of the people of our nation.

Our lives have a first and second curve. The first is your me curve - fluid intelligence that peaks around 40. The second is your we curve - your wisdom, teaching, and ability to bring out the best in others. It requires you to serve others.

Until about 70,000 years ago, humans were just another kind of animal. They weren't particularly important. Their impact on the world was not greater than that of jellyfish, fireflies, or woodpeckers. However, 70,000 years ago humans evolved new cognitive abilities that turned them into the most powerful force on the planet.