When a conflict arises in my life, I always ask myself: "What would Kakarot do?" (I know he goes by Goku, but the K was already there) I think Goku would remember to have strength not only physically, but mentally as well, and not to say or do anything that he would regret later. It is how one handles the pain that determines his or her strength. Either one can use it to destroy relationships that empower them, or they could grow stronger and become a Super Saiyan. In other words, don't let pride, pain, or anger ruin any friendships that make your life even minutely better. Whether you've said something stupid or overreacted doesn't matter. If you really care about the other person, you won't let such a minor grievance destroy the relationship.
Super Saiyan 4 is the End of Evolution!