Forgiving others is essential for spiritual growth. Your experience of someone who has hurt you, while painful, is now nothing more that a thought or feeling that you carry around.
There are various developmental theories that go into the tool kit that parents and educators utilize to help mold caring and ethically intact people, including those of Swiss psychologist Jean Piaget and American psychologist Lawrence Kohlberg.
Conflict doesn’t mean the end of your remarriage, and can actually make it stronger. There are always going to be disagreements; you cannot avoid them entirely. What you can do, however, is become skilled at recovering from disputes by talking about your perspectives afterwards.