Perhaps you'd better start from the beginning.
3 seconds sound clip from the The Curse of Frankenstein movie soundboard.
You can hear this line at 00:05:29.363 in the Blu-ray version of the movie.
Quote context
[...]
- Perhaps you'd better not tell me what you consider so important.
- Do you want me to call the guard?
- I apologize. Please, sit down. I said I apologize. I'll not forget myself again.
- Perhaps you'd better start from the beginning.
- Where did it all begin? I suppose it was when I was a boy at school.
- I always had a brilliant intellect.
- That old fool who used to teach us may have been able to hoodwink the others, but what did he know?
[...]