It's been said that there are only two pains in life, the pain of discipline or the pain of regret, and that discipline weighs ounces while regret weighs tons.
Some of the biggest challenges in relationships come from the fact that most people enter a relationship in order to get something: they're trying to find someone who's going to make them feel good. In reality, the only way a relationship will last is if you see your relationship as a place that you go to give, and not a place that you go to take.