I agree with this. I had a friend who was very close to me who started acting very erratically all of a sudden. The drs couldn’t figure out if she was bipolar/schizophrenic/etc but dealing with her behavior was frightening, hurtful (she would say really horrible things when she was feeling down or out of it) and emotionally exhausting/taxing. It got to the point where I couldn’t emotionally handle dealing with her problems and her noncompliance; it was constantly worrying me. That was a friend; I think I couldn’t handle it in a marriage. I have a lot of respect for people that do because I don’t see myself being able to handle it. I’ve heard/seen cases of people hurting their loved ones because of whatever they were going through at the time. Depression would be emotionally exhuasting to deal with but that might be tolerable; I would be more concerned with what the person was capable of doing WHILE they were depressed. Are they compliant with medication? What are their lowest lows. I was always scared my friend was going to hurt me or herself when she had one of her episodes. It was one of the scariest things ever and I can’t imaging feeling like that with my husband. It would be devastating.