 But if they neglect the marriage along the way, they may end up all alone. Likewise, investing in the lives of children is also an incredibly important thing to do. But in a few years, when the children are going to be out on their own, what then? It's far better to invest in your marriage now, so when you reach your career goals or your children are grown and off on their own, you'll have a thriving relationship to enjoy with your spouse the rest of your life.