My wife is far-sighted and I am near-sighted. Because we each have a different strength with a corresponding weakness, we make a pretty good team. Without our glasses, we perceive the world differently. She can read road signs in the distance, but I can read menus. She keeps me from missing my exit, and I can tell her to order the chicken cacciatore. But when we both think we are absolutely right and the other person is totally wrong, there will be the inevitable conflict.