Thoughts are words and vibrations. If you can just watch them they remain for a while and dissolve, but if you get identified or involved with them, then they get empowered by your energy creating positive or negative states of emotions and feelings. It is up to you to be alert and not participate and allow the negative thoughts to come and disappear without robbing your happiness. Thoughts have no power, all power is with You!
Shuddhaanandaa Brahmachari