I believe that we all behave the way we do and believe the things we do for reasons that were useful at one point in our life. Those ways of being, and ways of relating to others, often stop being helpful, however, and that's when I think therapy is useful - to understand the context of our actions and attitudes, so we can take control over them.
I also believe that every person exists in context, and understanding yourself can have positive impacts on all of your relationships - at work, at home, everywhere.
If you're considering therapy, chances are there are some things you'd like to change in your patterns of behavior or relationships. Understanding those things as part of a broader context will help you take charge and make changes, to feel in control of your choices, and to live the life you want.