Not as good my the course on miracles I have:
FAQ: Why aren't more miracles done to convert people to Christianity?
"When only a miracle leads a person to acknowledgment of God and to adoration and piety, he acts from the natural and not the spiritual man. For a miracle infuses belief by an external and not an internal way, thus from the world and not from heaven. The Lord enters man by an internal way, by the Word and by doctrine and preaching from it. As miracles close this way, no miracles are done today" (Divine Providence n. 131).
Man is not brought by external means to think and will, thus to love and believe what pertains to religion, but the man brings himself and compels himself to do so. Self-compulsion is not contrary to rationality and freedom. (Divine Providence n. 129).
"Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will sup with him, and he with me."
-- Rev. 3:20 KJV
Miracles do not induce faith. "That miracles are of this nature can be clearly established from those performed in the presence of the people of Judah and Israel. Although they beheld many miracles in the land of Egypt and later at the Red Sea and others in the Wilderness and particularly on Mt. Sinai when the Law was promulgated, nevertheless, in a month's time while Moses tarried on that mountain, they made themselves a golden calf and hailed it as Jehovah who had led them out of the land of Egypt (Ex 32:4-6). Again, it is plain from the miracles done later in the land of Canaan; nevertheless the people fell away time and again from the prescribed worship. It is equally plain from the miracles which the Lord did before their eyes when He was in the world; yet they crucified Him. (Divine Providence n. 132).
http://www.mechanicsburgnewchurch.org