“Since they are no longer two but one, let no one split apart what God has joined together.” Matthew 19:6    Selfishness, immaturity, unrealistic expectations, and manipulation will hurt your marriage. The fifth deadly assassin of marriage is a lack of commitment. When you make your marriage vows you’re not just making a temporary commitment. When you say, “Till death do us part,” you’re not talking to their size eight because ten years later, they may be a size eighteen. You’re n...