Our thoughts are one of the most important thing about us as humans, its part of the process that make or mar us. I want to add emphasis to the section where you talk about rebuking and snapping out of negative thoughts. Negativity comes in so many different ways but its final germination process is our mind and once we allow it to grow it becomes a huge problem not just to us alone but to our society and the world at large. Its very important to filter our mind and and remove every form of negative thoughts at the earliest stage possible in order to remain positive, not just for ourselves but also for the people around us. Because whether we like it or not, whatever we do does not only affect us, but also do affect other people around us too.
Nice piece about the mind, it will do a lot of good.
Remain blessed.