Authors:

Quite simply, no matter how hard you try, no matter how "open" you are, you'll end up surrounded by "yes people." It's hard not to believe people who are repeating your own ideas. Resist the temptation.

Tom Peters (2010). “The Pursuit of Wow!: Every Person's Guide to Topsy-Turvy Times”, p.47, Vintage
Quite simply, no matter how hard you try, no matter how open you are, you'll end up surrounded by yes people. It's hard not to believe people who are repeating your own ideas. Resist the temptation.