A shady place and a sunny hill, polar natural forces, or the origin of all things? Yin and Yang are defined as two complementary principles of Chinese philosophy. Their interaction is supposed to maintain the harmony of the universe and influence everything in it. They stand for polar opposing and yet related dual forces or principles that do not conflict but complement instead. A cosmic principle that holds up a mirror to human existence. Peace and rebellion are two other principles that, globally and cognitively, tend to fight rather than complement each other. Freedom, happiness, and contentment are not the cause but the consequence of both global and inner peace, out of which a well-founded, unclouded external rebellion can grow and emerge. A rebellion of nature against the human species is probably the manchineel tree which contains strong toxins. While the leaves secrets a toxic milky sap that is irritating to the skin and eyes, poisonous gases develop when the tree burns which can lead to total blindness, and its fruits are deadly of course. Rebellion or peace, Yin or Yang or both together combined in one?