Divorce & Marriage. Those things actually have several things in common. Both must be witnessed. Both are legally binding. Both involve two people. Both involve the consent of those two people. Both require the signatures of those people. Both affect the future of those people. Both involve a life adjustment. Both involve a commitment to the decision being made.
Although they have these aspects in common, there is a significant difference. Marriage is unifying. Divorce is dividing. One binds two people together and the other breaks that bond. One testifies to the union of two people and the other declares the separation of them. These important details cause their stark contrast to be exceedingly evident.