Instead, I’m here to tell you finding your purpose isn’t enough. The challenge for our generation is creating a world where everyone has a sense of purpose.

I’m a rather slow writer and I have to go to a coffee shop. I turn my back to the crowd in the cafe, so that everyone’s chatting and the noise of the place rises behind me, and then I just keep my head down and churn out my screenplay. I can’t write at home, because I get too lazy. I’ll just want to watch TV or fall asleep. But I’m not allowed to lie down and fall asleep in the cafe, right? So it kind of forces me to work.

It looked like an agricultural frame, something you might grow peas up – a lot of wires and cables strung from posts over a space the size of 57 tennis courts. It was actually built to study radio emission from quasars. I built the prototype and then six of us took two years to build the real thing.

Of course, the most rewarding part is the "Aha" moment, the excitement of discovery and enjoyment of understanding something new, the feeling of being on top of a hill, and having a clear view. But most of the time, doing mathematics for me is like being on a long hike with no trail and no end in sight! I find discussing mathematics with colleagues of different backgrounds one of the most productive ways of making progress.

I think I wouldn't have made it if I didn't go through those struggles but that still doesn't make it right for kids to have to go through the past that I went through.

To be remembered for all the things that you do and as someone who makes people smile, touches people's lives – that is what should wake you up every single morning.

It went past being hungry; it was actually painful in your stomach. I could feel my intestines twisting in the middle of the night. I would scream to my grandmother and she would get me sugar water and it would settle it down. A lot of my values come from being resilient. The people from my community might be poor financially but they are happy, proud and resilient people.