the world consists of contingent beings: they are temporary and have the possibility of not existing.contingent beings are dependent, their existence depends on other factors e.g. plants and animals are dependent on the sun and water, etc. if everything were contingent then nothing would exist at all, as contingent things need a cause, infinite regress of contingent things is impossible therefore not all things are contingent.there must be a necessary being to start off the chain of contingency, this necessary being is God