In this talk, the way in which a stable macroscopic world arises from its microscopic ingredients will be discussed. The structure and properties of matter as we see it around us is formed mainly by the electric forces between the basic elementary particles. Equally important roles are played, however, by phenomena of quantum physics such as the Heisenberg uncertainty principle and the Pauli exclusion principle. In particular, the importance of the exclusion principle by describing the catastrophic consequences it would have if this principle was violated will be illustrated.