Taking action from thoughts that serve me


I Get the concept of your thoughts creating your actions but Iā€™m having a really hard time with getting behind the thoughts that I want to have that will serve me. I even fully BELIEVE the thought but yet I continue to take action from the thought that is not serving me at all. Why do I continue to do this? How can I fully embody the positive thoughts that I have that serve me and take action from that place?