With age comes wisdom! Well. that's the way it is supposed to work anyway.
A lot of young people would be wise to print your posting and use it as a guideline for living.
I too have been married for over 50 years and I strive to use the wisdom gained over all those years.
I'm probably not as good at it as you, but I do try!! I hope others will take your fine advice.
If you are a grandaddy, I bet your grandkids are proud of you.