Positive thinking is one of the most valuable tools that postmodern man possesses for personal development and transforming community life. Positive thinking is based on the harmonious relation of the individual with himself, with the others, and with the surrounding reality. It comes at the end of a process of conscious change which the individual goes through in gradual steps, and becomes nuanced as thinking and personal practices develop. Our starting point is the role of thinking as laid out by (...) Descartes. Descartes’ conception of philosophy as a thought system points to the acquisition of virtue through knowledge of truth, by cultivating measure, and thus highlighting man as a thinking being. The entire effort of achieving knowledge, of acquiring wisdom, has a moral finality. Its fundament is the presence of God as the infinite instance that deems possible the free manifestation of the human person. As a thinking being, the human subject brings himself into existence. He certifies the reality of the world. Everything takes place on the horizon of the infinite self-existence represented by the philosophical idea of God. As a spiritual being, man can use thinking to shape his desires, to master his willpower, but most of all, to integrate himself in the process of conscious personal development. (shrink)