The body is made up of trillions of living cells. These cells grow, divide, and die in an orderly fashion. This process is tightly regulated and is controlled by the DNA machinery within the cell. Cancer is a disease of the cells in the body. Opinions of researchers: cancer cells originate from normal cells when their DNA is damaged; DNA damage may be inherited from parents or may be a spontaneous problem that occurs during the lifetime of a person; cancer is essentially a genetic disease; each cancer is different according to its biology and pathophysiology; cancers are exceptionally heterogeneous entities; every type of cancer has its own rules. Jesse Greenstein (Biochemistry of Cancer, New York, 1954) formulated the ‘convergence hypothesis’ of cancer, which states that the enzymatic activity of malignant neoplasms tends to converge to a common pattern. Today, researchers formulate the concept of the clonal evolution of cancer cell populations. Tumors can be thought of as 'continents' populated by multiple cellular species. According to the Ferromagnetic Cancer Theory (Theory from The Old Testament), cells obey the same laws of chemistry and physics that determine the behavior of nonliving systems. The structure and physical properties of any cell must ultimately be described by the known laws of chemistry and physics. Any cell is a society of dia-, para-, superpara-, ferri- and ferromagnetic nanoparticles that have local magnetic contacts. Cancers destroy people, animals and even plants by intracellular superpara-, ferri- and ferromagnetic nanoparticles. These nanoparticles can magnetically (and chaotically): 1) distort DNA (deletions, amplifications and point mutations); 2) shift chromosomes (chromosomal translocations and inversions; duplications or losses of whole chromosomes); 3) attract intracellular atoms, molecules and nanoobjects (suppress mitochondrial, lysosomal and other enzymes). ‘Intracellular magnetic chaos’ creates exceptional heterogeneity and enzymatic abnormalities within cancer cells. Some cancer cells are ‘immortal beings with suspicious lysosomes’. Lysosomes (‘suicide-bags’) are cellular organelles that contain acid hydrolase enzymes. Otto Warburg argued, cancer should be interpreted as a type of mitochondrial disease. In 1966 Otto Warburg delivered a lecture in which he stated that cancer prevention and treatment should focus on the administration of respiratory enzymes and co-factors, such as iron and the B vitamins. Today, researchers know that cancers are characterized by extensive genomic instability, which can be detected among any histological subtypes and among different foci within a tumor. The genomic changes occur at different levels, from mutations in single or few nucleotides to gains or losses of entire chromosomes or large chromosome regions. The known laws of chemistry and physics describe any normal cell as cell with non-numerous superpara-, ferri- and ferromagnetic nanoparticles; any cancer cell as cell with numerous superpara-, ferri- and ferromagnetic nanoparticles. Anti-iron methods of The Old Testament can beat any cancer (intracellular superpara-ferri-ferromagnetic 'infection').