“Your most unhappy customers are your greatest source of learning.”
–Bill Gates (1955 – )
Co-founder and chairman of Microsoft
You can draw value from a naysayer or cynic by remaining objective and positive in your thinking (yes, it can be tough).
Occasionally, they’ll point out valid hurdles or challenges you haven’t seen (even if they present it like an @ss). With their help, if you can remain objective (and keep your ego in check), you’ll have a better chance of getting something valuable from the interaction.
Stay objective. Be no ego. Get value.