Don Corleone: [to Sollozzo] I must say no to you, and I'll give you my reasons. It's true. I have a lot of friends in politics, but they wouldn't be friendly very long if they knew my business was drugs instead of gambling, which they rule that as a - a harmless vice. But drugs is a dirty business...It makes, it doesn't make any difference to me what a man does for a living, understand. But your business, is uh, a little dangerous.
Sonny: Aw, you're telling me that the Tattaglias guarantee our investment?
Don Corleone: I have a sentimental weakness for my children, and I spoil them, as you can see. They talk when they should listen.
[Sollozzo leaves after the Don wishes him luck]
Don Corleone: [to Sonny] Whatsa matter with you? I think your brain's goin' soft ...Never tell anybody outside the family what you're thinking again.
  
  
  
  
  
   
  
  
Sonny: Aw, you're telling me that the Tattaglias guarantee our investment?
Don Corleone: I have a sentimental weakness for my children, and I spoil them, as you can see. They talk when they should listen.
[Sollozzo leaves after the Don wishes him luck]
Don Corleone: [to Sonny] Whatsa matter with you? I think your brain's goin' soft ...Never tell anybody outside the family what you're thinking again.
 Don Corleone :  [to Sollozzo]  I must say no to you, and I'll give you my reasons. It's true. I have a lot of friends in politics, but they wouldn't be friendly very long if they knew my business was drugs instead of gambling, which they rule that as a - a harmless vice. But drugs is a dirty business...It makes, it doesn't make any difference to me what a man does for a living, understand. But your business, is uh, a little dangerous. 
 Sonny : Aw, you're telling me that the Tattaglias guarantee our investment? 
 Don Corleone : I have a sentimental weakness for my children, and I spoil them, as you can see. They talk when they should listen. 
 [Sollozzo leaves after the Don wishes him luck]  
 Don Corleone :  [to Sonny]  Whatsa matter with you? I think your brain's goin' soft ...Never tell anybody outside the family what you're thinking again. 
http://www.moviequotedb.com/movies/godfather-the/quote_9516.html