I get to choose who I am and what I think and do. I am not a subject to any other or any force beyond my control within the laws of physics. So when something within me tempts me with it's allure, I reason, analyze and conclude as to whether I want that temptation to continue. It is up to me to choose is what I am saying here. In that sense, I become the one responsible for all my actions. Surely situations and circumstances dictate that I must modify my choices given forces outside my control, but even those are still controlled by however I decide to proceed. Given my own sense of principled behavior, I understand the limits my choices offer simply because I only try to accept options that align with my honorable intentions.
I chose to follow a set of principles that best define my own personal nature. It was and is up to me to filter out those things that are not in agreement with my happiness or the happiness of others. When I first started out in life I was an open book full of blank pages. Now that I am much further along in my life the majority of pages that were blank are now full and the remaining blank pages have an outline to consider that will be followed as long as I remain consistently true to myself.