The kalam cosmological argument (KCA) for God’s existence goes as follows: 

(1) Everything that begins to exist has a cause
(2) The universe began to exist
(3) Therefore, the universe has a cause

When we consider what kind of cause would be necessary to bring the universe into being, we arrive at an immaterial, eternal, spaceless, personal, intelligent, and powerful being – an apt description of what theists identify as God.  Atheists commonly object and theists often wonder, “Well, then who made God?”  Theists rightly point out that the argument does not claim everything has a cause, but only those things that begin to exist.  As an eternal being, God never began to exist, and thus does not need a cause.  Indeed, the question itself is nonsensical given the kind of being God is. 

We apologists must be careful, however, not to think that the 1st premise of the KCA proves God does not have a cause.  The premise only pertains to things which begin to exist.  We cannot infer anything about the causal requirements or lack thereof for eternal beings from this premise.  While the 1st premise of the KCA does not require that God have a cause, to think it proves God does not have a cause is to commit the fallacy of denying the antecedent:

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