Forgive me, but that’s not true;
@Erose provided a clear and theologically material answer which is scripturally sound. It was nothing like saying “I don’t know,” although we also have to say there are many cases where “I don’t know” is the correct and desired answer, for example, questions about the inner workings of the sacraments or the Divine Essence of God, which are, respectively, sacred mysteries, and entirely inscrutable.
Furthermore, there is an extremely straightforward answer to your question and that is “theosis,” and an even easier one, that being charisms. It is well known that many of the great Patristic figures and even recent figures such as the Eastern Orthodox bishop St. John Maximovitch performed miracles while still among the living; these acts, enabled by cooperation between humans and the indwelling Holy Spirit in our salvation, take a huge array of forms.
And as it happens, we have scripture, 2 Maccabees 15:14-17, which can be found in any complete King James Version, and which is recognized by all the Eastern Orthodox and Oriental Orthodox churches, which validates the intercession of the saints.