You have control over your actions based on present chemistry

What is it about self-control that makes it so difficult to rely on? Self-control is a skill we all possess (honest); yet we tend to give ourselves little credit for it. Self-control is so fleeting for most that when Martin Seligman and his colleagues at the University of Pennsylvania surveyed two million people and asked them to rank order their strengths in 24 different skills, self-control ended up in the very bottom slot (for the record, self-control is a key component of emotional intelligence).  When it comes to self-control, it is so easy to focus on our failures that our successes tend to pale in comparison. And why shouldn’t they? Self-control is an effort that’s intended to help achieve a goal. Failing to control yourself is just that—a failure.

http://www.forbes.com/sites/travisbradberry/2012/09/17/the-six-secrets-of-self-control/#2cd78d9812aa