This video from C.S. Lewis Doodles is an excellent tutorial on how to answer objections against miracles by C.S. Lewis.
Many times you will hear skeptics say that the belief in miracles is irrational and unscientific. But this sort of objection misunderstands the relationship between physical laws and God. If God exists, then miracles are not impossible. The laws of nature in such a case simply describe what happens when that God does not intervene.