What man has done, man can do, or words to that effect.
3 seconds sound clip from the Holiday (1938) movie soundboard.
You can hear this line at 00:10:43.377 in the Blu-ray version of the movie.
Quote context
[...]
- Oh, but, darling, you're going to make millions yourself.
- Oh, but, darling, no, I'm not.
- Oh, yes.
- No, not Mr. Case's little boy.
- I'm a plain man of the people. I began life with these two bare hands.
- So did the gentleman over the fireplace. Take heart from Grandfather.
- Don't tell me you're one of those Setons?
- Yes, Johnny. Forgive us, but we are.
- What man has done, man can do, or words to that effect.
- Now, see here, child, if you think I'm going to be any young wizard of finance, you're...
- Cheer up, it's not all that serious.
- If you don't think my breaking the news of this engagement to Father is serious...
- I thought you said you were going to church?
- I am. That's why I'm clever. Because Father's in church, and in church, Father can't talk.
- No. But this is the best way.
[...]