One of my favorite philosophical tenets is that people will agree with you only if they already agree with you.

Related:

• If you can't agree,
  then agree to disagree...
• Ah! don't say you agree with me. When people agree with me I always feel that I must be wrong.
  Oscar...
• Ah! Don't say that you agree with me. When People agree with me I always feel that I must be wrong.
  Oscar...
• Funny,
  only sensible people agree with me...
• Don't you wish that all the people who sincerely want
  to help you could agree with each other...
• Some of you might not agree 'Cause you probably likes a lot of misery But think a while and you will see.
  Broken hearts are for assholes Broken hearts are for...
• Enforced recreation live on stage in London ... I'll do the stupid thing first and then you shy people follow.
  Frank Zappa, "You Can't Do That On Stage...
• Do you agree? -- Blake Do I have a choice? -- Avon Yes -
  Blake Then I agree --...
• Anybody who wants religion is welcome to it, as far as I'm concerned -
  I support your right to enjoy it. However, I would...