For me as a family man,the source of family happiness is understanding that God is the center of all.2ndly creating fun in little ways matters,be a help mate to your spouse.no job is meant for a woman/man in the house.. know that your wife is not your slave,be a great father ,a great husband,and a friend to all.settle fights if any as soon as possibleIf you are married please tell us what you feel is the source of your family happiness. If you are still contemplating you can also share your opinion too. Welcome everyone