One is that both theories believe that there must have been a starting point for the universe. They both believe that it was created for a reason and that eventually there will be an end point. St. Aquinas believes that everything is constantly changing and that for change to begin there must have been something that made it possible. The primary source of things that move is obviously God. Aquinas believes that all things trace back to God, who "is a being having its own necessity..." (Philosophical Proofs for the Existence of God) A key belief in Tommaso's design argument is that if something exists, there is a reason why it exists and it is a necessity. Another comparison that both Kalam's Cosmological Argument and Aquinas's Design Argument make is that they both believe that the Universe began with the big bang. The difference between Kalam's Cosmological Argument is that Aquinas's Argument from Design is caused by motion, an object is in motion and can send another object into motion. All things in the universe that are moving and changing can be traced back to