“We may never find a complete Theory of Everything; indeed, philosophers may argue that such a feat is impossible. Let them think that. What I hope I have shown you throughout the course of this book is that particle physics isn’t about the what of our theories – it’s about the how we got there of them. It’s not about the quarks or the leptons, the fermions or the bosons – it’s the fact that we can dream up these ideas and put them to the test in dedicated laboratories that harness our understanding of matter and forces to further our understanding of matter and forces. It’s a task that persistently tries our collective skills and intelligence – that continuously challenges our picture of the world – and yet it’s a task that thousands of people from countries all around the world are still drawn to. It’s a task that unites us through a shared curiosity as to the nature of reality. And that, perhaps, is the most important lesson we can learn from what we have achieved in particle physics so far.”