||The essentcial doctrines of the Primitive Buddhism lies almost surely in the Ancient Pali Canon. No secret doctrines are suggested, no dogmatic statements. Buddhism is a religion in the sense of a trend to Absolute. Historically, Buddhism emerges in a social setting of religious tolerance. It partially mantained the ancient traditions, pari~ally introduced new tenets, as God's inexistence (anissara) and the inexistence of the Self (anatta). It rejects the authority of the Vedas. The doctrine of Buddhism can be reduced to a double principle: a) There is the conditionate ant its cause; b)There is the inconditionate and the way to it. Owing to the fact that “conditionate” equals “painful”, the double principle induces the formulation of the Four Noble Truths: 1. Pain exists; 2. And its cause; 3. Cessation of pain exists; 4. And its cause. The conditionate, the pain, is the world, conceived as something irreal, framed from two principles: the physical (rupa) and the immaterial (nama). The world as recurrence of pain is the samsara. It has a cause, therefore it can be stopped. The inconditionate, the transphenomenic, coalesces with the notion of nibbana, the deep conciousness, conveying the illumination. In that sense, the way to the nibbana is knowledge.