 Arguments to a First Cause in time contend that a continuous temporal regress from one contingent existence to another would never account for the existence of the cosmos, and they conclude that it is more reasonable to accept there was a First Cause than to accept either a regress or the claim that the cosmos just came into being from nothing. Arguments to a sustaining cause of the cosmos claim that explanations of why something exists now cannot be adequate without assuming a present, contemporaneous sustaining cause. The arguments have been based on the denial of all actual infinities or on the acceptance of some infinities (for instance, the coherence of supposing there to be infinitely many stars) combined with the rejection of an infinite regress of explanations solely involving contingent states of affairs. The latter has been described as a vicious regress as opposed to one that is benign. There are plausible examples of vicious infinite regresses that do not generate explanations: for instance, imagine that Tom explains his possession of a book by reporting that he got it from A who got it from B, and so on to infinity. This would not explain how Tom got the book. Alternatively, imagine a mirror with light reflected in it. Would the presence of light be successfully explained if one claimed that the light was a reflection of light from another mirror, and the light in that mirror came from yet another mirror, and so on to infinity? Consider a final case. You come across a word you do not understand; let it be “ongggt”. You ask its meaning and are given another word which is unintelligible to you, and so on, forming an infinite regress. Would you ever know the meaning of the first term? The force of these cases is to show how similar they are to the regress of contingent explanations.