You can disagree without being disagreeable. That's always been my mantra.

You can disagree without being disagreeable.

To disagree, one doesn't have to be disagreeable.

We may disagree on some things, but we can do so without being disagreeable.

Just because I disagree with you doesn't mean I'm disagreeable.

If you have learned how to disagree without being disagreeable, then you have discovered the secrete of getting along - whether it be business, family relations, or life itself.