"Think of others first, before yourself. Put your wife and child's best interests at the forefront of your activities before you look after yourself."
This is the best advice that I can give you as well. First, tell your wife that you are committed to doing ANYTHING possible to show her that you want to be married to her. Tell her that you will move heaven and earth to avoid getting a divorce. Then, work on addressing the things that make her mad. Also try to work on your faith life together. Always discuss important issues with her, don't let things simmer. Let us know how it works out, good luck.
The world's dearest people say stuff like that...but it is the wrong thing to say in a marriage. He should say that he loves her and wants to stay married. He shouldn't act desperate and willing to do anything. I've seen that destroy a marriage, and I've read about more than I've seen first hand. There are two things to worry about: not caring enough and caring too much. He's not her child or her pet. She may sound like she wants obedience but she won't respect it. Justice, respect, humility, cooperation, forgiveness....these are good. Weakness, emptiness, over pliability, dominance, rudeness, control....these are on either side the extremes to avoid.