On a fundamental level, any experience that nudges your mind to engage from a unique angle is immensely valuable. Art, for instance, demands a different set of appreciation and communication skills. It invites you to respect and marvel at someone whose talents may be starkly distinct from your own.

I still believe that nuclear is the greatest risk we face as a society today.

The brains of our ancestor Homo sapiens were the same as our brains. How to draw, how to write, how to think, have all been learned, sometimes with great difficulty, and the learning has been passed on.

Think about anything you've ever achieved in your life that you're proud of... It will have taken a huge amount of sustained focus and attention. When your ability to focus and pay attention breaks down, so too does your ability to achieve goals.

Most people we have worked with who have accomplished great things have an other-centred purpose, and that's never just 'make a lot of money…' – it could be to make women's lives easier, to close the inequality gap, to change the world, it's something which isn't strictly personal and selfish.