Everything in the world is dual, the interaction of duality and makes an eternal first push, forcing the development of movement, whether in the form of a spiral, in the form of a ring or a tunnel. Examples of a huge mass: the law of dialectics of unity and struggle of opposites; corpuscular-wave dualism of quantum mechanics; binary system of numbering; formation of a new organism by merging two haploid cells; good - evil; love - hatred; death - life;...