This is what you take to the viva: a treasure chest you can open to respond to questions, think about your field and share what you know about your research. A hoard you have stored up day by day over the life of your PhD. You didn’t simply find it. You didn’t follow a map and it was waiting for you.
You earned what you’ve got: countless gold coins of accumulated awesomeness. Super-valuable and yours to use in the viva as you need to.