It could obviously be used to his own advantage, provided he kept the secret to himself.
9 seconds sound clip from the The Man Who Could Work Miracles (1954) movie soundboard.
You can hear this line at 00:11:03 in the DVD version of the movie.
Quote context
[...]
- Yes, sir. He seemed all right a minute before. It just seemed to come over him all of a sudden.
- Bless my soul. At 10 o'clock in the morning!
- It could obviously be used to his own advantage, provided he kept the secret to himself.
- Would you mind helping Mr. Robinson in the shop?
- Ah, you've already gone through those accounts, I see. Very good work.
- Really, I don't know which to have. And you're not helping in the least.
- The blue would make up very nicely, madam.
[...]