After my conversion the friend who sponsored me gave me a book on Eucharistic Miracles. I thought I already believed in the real presence but this book affirmed it in a such a, sometimes shocking, way it was like being hit over the head. I highly recommend studying at least some of these miracles, it will remove any lingering doubts anyone might have. Here is a list:
http://www.catholicdoors.com/misc/eucharisticmiracles.htm
and an example:
“A monastic priest doubted whether the Body of Our
Lord was truly present in the consecrated Host. He celebrated Mass and when he said the words of consecration, he saw the host turn into Flesh and the wine turn into Blood. Everything was visible to those in attendance.”
Or how about the one where the metal or wooden arms (can’t remember now) of the crucifix reached down and helped the doubtful priest elevate the host?
‘Bleeding’ Eucharist at Primary School in Moruga [Trinidad]
The Eucharistic Miracle of Lanciano, Italy (The Body and Blood of Christ) [Catholic Caucus]
Do You Believe in Eucharistic Miracles?
Eucharistic Miracle at St. Stephen's in New Boston MI.(Catholic Caucas)
[CATHOLIC CAUCUS] EUCHARISTIC MIRACLES
[CATHOLIC CAUCUS]'Body, Blood, Soul and Divinity': The Miracle and Gift of the Most Holy Eucharist
Looking After a Eucharistic Miracle (Franciscan Recounts His Special Mission in Siena)
Eucharistic Miracle: 2009?
Possible Eucharistic Miracle in Poland
The Eucharistic Miracles(Catholic Caucus)
Vatican display exhibits eucharistic miracles
Eucharistic Miracle - Bolsena-Orvieto, Italy
Physician Tells of Eucharistic Miracle of Lanciano -Verifies Authenticity of the Phenomenon
BLOOD TYPE FOUND IN ICONS IS SAME AS IN SHROUD OF TURIN AND 'LANCIANO MIRACLE'
Eucharistic Miracle: Lanciano,Italy-8th Century A.D.