" At some point look in the mirror and say, “Maybe I’m the one who needs to change. If I’m always critical, maybe I’ve developed a habit of seeing the bad rather than seeing the good. If I’m always skeptical, maybe I’ve trained myself to be cynical and sarcastic rather than believing the best. If I’m always finding fault, maybe my filter is dirty. Maybe I’ve become judgmental and condemning instead of giving people the benefit of the doubt.”
This is especially important in relationships. You can train yourself to see people’s strengths or you can train yourself to see their weaknesses. You can focus on the things you like about your spouse and magnify the good qualities, or you can focus on the things you don’t like and magnify the less-desirable characteristics that annoy you. "

― Joel Osteen , Every Day a Friday: How to Be Happier 7 Days a Week