Quotes from Roger Fisher

Pressure can take many forms: a bribe, a threat, a manipulative appeal to trust, or a simple refusal to budge. In all these cases, the principled response is the same: invite them to state their reasoning, suggest objective criteria you think apply, and refuse to budge except on this basis. Never yield to pressure, only to principle.

Reason and be open to reason; yield to principle, not pressure.

Understanding is not agreeing.

As useful as looking for objective reality can be, it is ultimately the reality as each side sees it that constitutes the problem in a negotiation and opens the way to a solution.

the ongoing relationship is far more important than the outcome of any particular negotiation.

In a mental hospital, we do not want psychotic doctors.

Like it or not, you are a negotiator.

By definition, inventing new ideas requires you to think about things that are not already in your mind.