GIVEN: The universe exists. Either: A) The universe has always existed, or B) The universe began to exist. If A is true (i.e. the universe has always existed), then the universe has existed for an infinite amount of time. If that is true, then, by the second law of thermodynamics (which states, "the entropy of an isolated system not at equilibrium will tend to increase over time, approaching a maximum value"), all the energy in the universe would be effectively disbursed at equilibrium, and the whole universe would be at about .1 degrees Kelvin. However, we do not observe the universe as such. Therefore, A is false, and the universe had a beginning. If the universe had a beginning, either: A) the universe created itself, or B) the universe was created by something else. A cannot be true, because an object cannot be its own efficient cause. Therefore, the universe must have been created by a Creator.