You always do what you want to do. This is true with every act. You may say that you had to do something, or that you were forced to, but actually, whatever you do, you do by choice. Only you have the power to choose for yourself.
And in life, it is all about choices we make. And how the direction of our lives comes down to the choices we choose. In every single thing you do, you are choosing a direction. Your life is a product of choices.