Locus of control: the extent to which people believe they have power over the events in their lives. A person with internal locus of control believes he or she have power and influence over events and thier outcomes. On the other hand, a person with external locus of control believes they have no power over events and external forces are in control. Developed by Rotter.
Personally, I am an internal locus of control believer. I believe that very few things in this world are uncontrollable. People believe that how "smart" you are exclusively controlled by external forces along with love and health. I can argue the opposite.
If we are comparing how "smart" a student like my age is based on grades; the only thing that they need is a hard work ethic in order to achieve decent grades. There is absolutely no way that a student could work hard and get less than a C in my opinion. Of course there could be a bad teacher and other forces that could impact how "smart" you are but only on rare occasions. I believe that my grades are 99.9% under my control.
For me, I don't necessarily believe that everybody has a single soul mate and that fate or some other force will draw you to them. I think that there are multiple people in the world for you and it is up to you to find one of them.
Health is an internal locus of control and external to a certain degree. Weight is definitely controllable unless a disease I do not know of can cause a person to be overweight. However, diseases like cancer and genetics are out of your control. My health is important to me and lifestyle. Here's a video of me on Halloween.