Because you'll never be a first-class human being or a first-class woman until you've learned to have some regard for human frailty.
— C.K. Dexter Haven (Cary Grant)
8 seconds sound clip from the The Philadelphia Story movie soundboard.
You can hear this line at 00:47:21 in the Blu-ray version of the movie.
Quote context
[...]
- We're very vain, you know. 'This citadel can and shall be taken, and I'm the boy to do it.'
- You seem quite contemptuous of me all of a sudden.
- No, Red, not of you. Never of you.
- Red, you could be the finest woman on this earth.
- This goddess must and shall remain intact.
- So help me, if you say another word, I'll...
- I'm through. For the moment I've had my say.
- Well, I suppose I should object to this twosome.
- That would be most objectionable.
[...]