I remember my first lecture at university. Before Dr Gould started telling us about complex numbers he shared an old proverb he thought would help us as we started our degrees:
Three things come not back: the said word, the sped arrow and the missed opportunity.
He then urged us to make the most of our opportunities while we were at university, not to let things pass us by. I’m fond of this saying. It’s stuck with me for almost twenty years, and it resonates with me for viva advice too.
Think before you speak: pause before you answer a question. Make the most of your opportunities in the viva, both to show what you know and get ideas and insights from your examiners.
Thankfully there’s usually not any arrows flying around!