If he'd not been Caesar, he'd been the greatest gladiator in Rome.
3 seconds sound clip from the The Fall of the Roman Empire (1964) movie soundboard.
You can hear this line at 01:41:08.169 in the Blu-ray version of the movie.
Quote context
[...]
- That's no reason to change your ways.
- You miserable, uneducated, half men. You are not at all what we fought for.
- And yet... Yes, we want you. We want you.
- Sister!
- If he'd not been Caesar, he'd been the greatest gladiator in Rome.
- Yes! You do belong in the arena.
- You mean to say you came all this way to sharpen your wits.
- Everything you do has a purpose.
- I came to tell you what your friends dare not.
[...]