Yep, miracles are good to tell your father because people who get in that condition start to believe only science and scientists. You need to harness this situation and that is to get your hands on the scientific data, the scientific testimony that shows non-Catholic scientists have studied and tested miracles and are baffled.
One such I remember was from Lourdes, and around the turn of the 19th century when there were x-rays. A man in Europe so completely broke his leg below the knee that the bone protruded the skin. He lived for months
with this while doctors tried to set the bone with no success. He finally decided to visit Lourdes. People on the train were used to seeing to the sick, but it was especially gruesome to see this man on crutches with his foot twisted almost facing backward. He finally bathed in the water, but nothign happened. Most of the miracles usually happened after being blessed by a priest with the Blessed Sacrament over the crowd. The very next days he was seen walking on his leg, pefectly healed. The same doctors and scientists took x-rays and compared older x-rays. Bones that heal show scar tissue on the bone where the break was. This showed in the x-ray in the same place, however, scientists saw that a missing piece of bone that prevented healing was now in place.
Similiar occured at Lourdes to a man from Britain. He had a pension from the state because of his injuries. A hole in his skull where you could actually see the out membranes of the brain. His are was atrophied and useless, and I can't recall but he couldn't walk and was in wheelchair. Long story short, he was healed, had no more hole in his skull. This is docuмented by doctors, who don't call it a miracle because they are not Catholic, but verify the truth and simply say they cannot explain it. The healed man further went to the British government and told them he didn't need the pension anymore.
How about Fatima itself. Unbelievers will inevitable say it was merely a rare natural phenomenon in the sky. But you must ask two things, how could the muddy ground which was drenched with water from all the rain, completely
dry in a matter of a couple of minutes? The best question - how could three children saying they were told by our Lady there would be a miracle, just coincidentally predict to the very minute, a rare natural phenomenon that was only seen at that city and never recorded in history?
Then you might like to look up the miracle 8 blocks from ground zero at Hiroshima where the frame of a house of Jesuits did not collapse, though the windows and walls broke and they were thrown about. Amazing for the building to have stood, but the miracle was they never were infected by radiation their whole lives. Tons of scientists have studied them and cannot explain it. Look up Fr. Hubert Schiffer
Once you relate several Catholic miracles, the big question is - why are scientists particularly baffled by the fact these always pertain to Catholics?Incorruptibles