Old History
Old History is never good for a marriage when it can only remember the negative events. This has become a main issue with marriages. Choosing to stay in the past and not letting go of things that went wrong, is not healthy.
You that have never sinned – cast the first stone
Good communication language looks for the positive with everything. Continuing to bring up negative history will not produce peacefulness in oneself nor in a marriage. Marriage is challenging enough and does not need the backlash of what was done wrong from any time period (yesterday, a month ago, months ago, last year or even years ago.) Let it go!