This morning I found this gem by Georges Bidault, an active member of the French resistance during World War II and later French prime minister: "The weak have one weapon: the errors of those who think they are strong."
His words reminded me of something we study in martial arts, particularly in takedown moves. Often the best strike is to leverage your opponent's momentum and let him carry himself down to the mat. It literally involves letting your attacker overplay his hand and then guiding him past you towards the ground -- like Wile E. Coyote zooming past Roadrunner over the cliff.
Have you ever been in a heated debate with someone who is pressing you and pressing you with a point that they are prosecuting with such ferocity that you are getting hammered against the wall with seemingly no option other than to concede? The best response might be to sidestep their argument by saying, "Yes, you actually have some good points." You have now disarmed their case and opened the possibility that you can propose suggestions (and perhaps even refutations) that have a much better chance of being heard.
Carl Jung famously wrote that "What you resists, persists." The harder you push, the harder the opposing force. In matters of discord pride finds fertile ground. It is hard to slow down, regulate your emotion, and proceed methodically.
But the goal of most disagreements is not victory, it is progress. Often we're better off starting from a place of assumed agreement and letting the other person's hubris create openings for our position. Let them be right and you get what you want.