Is thinking a form of karma, the philosophy is taken care of by doctrine of Bhava karma of Jainism. As per doctrine of Bhava karma every single thought positive or negative manifests into an act of karma. It is due to this philosophy no human being can ever idle.
Even in our idling the law of karma keeps operating in the background.
Spirituality advocates indulgence in good thoughts, positive thoughts to manifest life, manifest destiny. It is an absolute fact of spiritual life that people indulging in positivity all the time always experienced success at all stages of spiritual pursuit. Even people whose goal of life is not spiritual manifest absolute success due to indulgence in positive thinking.
Positive thinking is the most subtle attribute of cosmic life indulging in which one can reach any scale of life. Napoleon Hill in his famous self-help book “Law of Success” enumerates power of positive thinking. My personal experience says one can reach any status in life indulging in positivity all the time.
When around nine years of age my eldest uncle handed me a copy of “Think and Grow Rich” by Napoleon Hill, telling me that if I could understand the philosophy behind, I could become the richest person on earth! He himself failed to understand the gist of it.
My goal of life from six years of age was spiritual, reaching god. Fond of reading books, I went through “Think and Grow Rich” several times but the philosophy of Napoleon Hill eluded me. As my goal of life was spiritual, nevertheless I did not want to manifest money at all. But one thing emphasized by Napoleon Hill surprised me… the power of celibacy (Brahmacharya Vrata)!
After contemplating on the issue again and again I realized if I could master celibacy (abstention from sexual indulgence) may be I could invoke positive thoughts all the time. I was right in my surmise. Practicing celibacy and side-by-side demolishing ego I finally succeeded reaching state of self realization, god realization 37 years of age.
I was finally able to establish total control over thinking process. Practicing absolute celibacy along with celibacy I finally reached stage of Nirvikalpa Samadhi (absolute nothingness) when not a single thought entered our brain uninvoked. I was finally able to negate my karma to zero. This helped me become a pure soul atman in the cosmic journey of life.
For me Books of Napoleon Hill were truly a direct dictate from god. Though books of Napoleon Hill do not directly relate to spirituality, but for me they worked wonders.