Empiricist philosopher David Hume created what he called the problem of induction. This problem casts doubt on casual relations between the cause and the effect to any given event. Hume says that because we cannot know the future at all we cannot say that A causes B necessarily. He said that A is a separate event and B is a separate event. There is no necessary link between the two. That is to say, what we know today about the laws of nature might not be the same in the future. They might not be necessarily constant. The same applies to the past. Because we cannot know the past, we cannot know that everything is at the same constant speed as the present time.
For example, while we know what the speed of light is presently we do not know if that speed is necessary. For all we know it could be contingent. There is just no way to test the future and see if the speed will stay the same.
This is a problem for the naturalist. It seems to create much skepticism for any type of induction or scientific claim. It forces the naturalist to uses probabilities instead of absolutes for future causal events. But how would a believer in God respond to this question? Well, a theist would say that we can know with certainty that things such as the laws of nature are constant. We know this because God exists and God upholds all reality. For Him to change the laws of nature would be somewhat deceitful.
The theist must accept God as the foundation of all knowledge. In order to remove any type of doubt about causal certainty or induction, God must be accepted first.