The viva might be the final challenge of your PhD, but it’s not the final challenge you’ll ever face.
The questions your examiners ask might prompt the final big discussion you have about your PhD research.
Your final preparations for the viva are building on a foundation that has taken years to create.
Before you start your viva take a final deep breath and remind yourself how you have got this far. Not by luck. Not by chance. Through work, determination and ability you have reached the one of the final things to do for your PhD.