I received a question about the Kalam Cosmological Argument. As you may remember, in furthering the argument we will want to say that an actual infinity cannot exist. It is for this reason that the universe cannot have an infinite past but must have had a beginning.
The question was why we cannot have an actual infinity with respect to the past but we can have an infinite being?
My response is below:
I believe part of your question is answered in question #248 on the Reasonable Faith website, and I would encourage you to read through it. In that response Dr. Craig details why an infinite regress is impossible. If you have any questions about the response, please let me know!
In short, it is important to note that when theologians talk about God being “infinite” they don’t mean it in the numerical sense. They mean that God is not finite in any way. God is not finite in his knowledge, power, goodness, etc. In other words, the theologian is saying that God is without limits. This is different than postulating the existence of an actually infinite number of things (such as would be the case in an infinite regress of causes).