I can't better Tilly's answer at 21.22, except to say that you need to add a bit of bloody-mindedness and faith (in my case). I found myself in the ruins of a relationship (for which I had left my neglectful etc. first husband once the children were safely at university).
This guy turned out to be a genuine psychopath (incarcerated eventually in a French mental hospital). I had burned my boats and was shut up with him in an isolated farmstead, 4 Km from the nearest village. Hands went round my throat, I was forced to my knees. I have a scar on my jaw and a red patch on my nose where he broke the blood vessels. I plugged on, regardless. Almost lost my faith. Not a good time. Eventually he attacked me and I called the Gendarmes and I had to go to my Dr. next day. This meant no more hiding. As luck would have it, 2 friends were coming out and saw my face.
I fought a divorce in the French courts (he tried, half-heartedly to commit suicide). I had to do it in French and pay for his translators (he never bothered learning the language). It was not the easiest time. A bit of British bulldoggedness,, a refusal to give in - and the value given to my existence by friends. It was then that I met my dear Mr. J2 and the rest is history. I have come to a very happy place.
Does this help? I really doubted my faith and screamed at God, but it came right in the end.