If Putin succeeds in Ukraine, it will show that democracy and the world's forces are not enough to stop him. Are we building a world where the rule of law means something? Or a world where the rule of law means nothing, and only firepower counts.

Our capacity to reason is recursive, combinatorial – we can reason about our reason – we can argue, criticise and develop tools that enhance our reason thanks to language and communication. We have the power to build on our reason, to enhance it.

We wouldn't want to live in a world of full transparency. That is a world where I can see into your brain, and you into mine. We all need privacy for our thoughts, and inside government we need politicians and advisers to be able to explore ideas in private.

As a prosecutor, I recognize that our involvement typically begins when it's already too late: when prevention, humanity, and common sense have failed. Violence, whether in families, communities, or at an international level, signifies a failure of humanity.

We define the credit risk of a bond portfolio as the volatility of the CDS basket which would perfectly hedge the sovereign risk of the portfolio.

This crisis is rooted in the collective delusion that burnout is the necessary price we must pay for accomplishment and success. Recent scientific findings make it clear that this couldn't be less true. Performance is actually improved when our lives include time for renewal.

Robustness is being in a good place and having a plan, resilience is being able to implement that plan and stay in a good place.

We should learn how to fight not flight. And fight doesn't have to be a physical thing – it can be that you feel something's going to be uncomfortable 'okay well let's avoid it'. No, go through with it but go through with it in a progressive manner, and go through with it in an intelligent manner and measure your results.

The average is the enemy of the marketer, because it actually disguises what you really need to know, which is the outliers, the unusual use cases, the anecdotal eccentricity, where most of the really valuable information lies.

Magical thinking is a bi-product of cognitive process that were useful in our evolutionary survival. We're so good at seeing patterns that we see patterns everywhere, even when they don't exist.

When you're in the present, looking forward, your brain sees change as scary. But from the far side, looking back, the fear fades.

In our low moments, music is our therapy, it helps us to cry, to breathe, or gives us the encouragement we need… it's our therapy. In our moments of happiness, music is our celebration… it's extraordinary.