Article 18

In the eighteenth article, the question is raised whether all the miracles which come about by the ministry of some creature come about by divine authority; i.e., by the divine power, without which nothing can be done.

This is true if understood in regard to true miracles (and I call those miracles true which are able to be accomplished by no natural power of any creature). There are, however, some miracles that are not miracles simply speaking but are only such in regard to those who are ignorant of the causes - just as there are certain things done by a human art or skill that seem marvelous to those who have no knowledge of the techniques. Even more so, things done by an angelic art or skill seem to be miraculous even though they are able to be accomplished by the power of some creature (though such things do not exclude the divine power).