My wife and I are older parents. We like to think we have much wisdom to pass on, but we have to be mindful of some very negative things we can pass on as well. Age brings healthy skepticism, and raising a daughter who reasonably questions authority will not be a bad thing. However, cyniscm often accompanies skepticism, and the last thing we want is a cynical child. Childhood should be about wonder and possibility. Cynicism can quickly kill that. So we have to keep the negativity in check.
A far more dangerous pattern also often emerges with age. Wrongs, suspicion, anger, and mistakes often brew contempt. And there is nothing less childlike than a contemptuous adult. Couples too easily become contemptuous of each other. People actually hold those with opposite views on social issues as enemies. Sometimes even the smallest infraction is left to simmer to years later boil over as hate.