Your mentor is very wise and the advice is spot on. You want to take the high road so that you can look back and say I gave it my all and I fought for my marriage w/dignity. You can hold your head up high, back straight and look at each and every person in the eyes. You don't have to remember what stories you've told to whom and you aren't looking over your shoulder each and every day wondering if someone is going to call attention to the actions that you have taken.
By taking the high road, you can sleep better at night and be proud of the person that you have become and know that you are far wiser than pre-crisis and now can go forth and share your wisdom w/others that cross your path.
You are the prize!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.