Constantly, the emotions you cherish becomes the source of your bio-energy. Whatever is the source of your bio-energy impacts your thinking. Please understand, it is like a vicious circle. It is like one feeds to the other. If you are constantly agitated, having depression, that becomes your bio-energy. If depression and agitation become your bio-energy, naturally you tend to think towards more depression and more agitation. So, what you think becomes your bio-energy, what is your bio-energy forms the basis for your thinking.