I am my thoughts, 100%
I used to be a very emotionless person, I always admired Spock from Star Trek, and I always found my self worried when watching shows about psychopathic serial killers, cause I could always relate to the lack of emotions.
Emotions are kind of a new thing for me. From ages 0 to 5 I felt nothing, I just was. I just witnessed, and thought without emotion. From ages 5 to 10, I was capable of some times feeling anger or frustration, but that is about it.
From ages 10 to 20, I felt nothing but occasional anger, frustration, or perhaps mild excitement/happiness, as well as an emotionless form of depression.
From ages 20 to 24 or so, my emotions became more and more varied, until I finally got to a point where I could experience all emotions. For the past 5 years or so, I have been more or less fully functional in the emotions department.
I also used to be a very introverted person, right up to the age of about 25 or 26, and would hardly talk to others.
I think because of this, I have the understanding of thoughts controlling emotions that I have.
I find I am capable of reasoning, thinking, and some times hyping or depressing myself in to any mood or emotional state that I like. The two are totally linked up, to the point that I can even ignore certain degrees of physical pain.
I think for me, in my case, I have a brain that is lead by thought first, and emotions second, and because of this I can control it.
If I am happy, I can start dwelling on things that piss me off, until I can produce real anger.
If I am angry, say having an argument with my girlfriend, I can use thought alone to remind my self of what is important, and turn my feelings in a positive direction.
I can get over depression just by deciding I’m not depressed anymore, and likewise can use thoughts to depress myself intentionally, for example if I want to spend a couple of days sleeping, I can just depress myself in to a kind of hibernating rut.
Some things I can’t control with thought alone, usually anything instinctive. For example fear is very hard to control or stop with thought alone, if anything it usually just makes it worse.
That is about all that comes to mind for now.