Fr. Hardon, who was Blessed Mother Teresa's spiritual director, was asked by Sister Fredrick to give a talk on the definition of Transubstantiation to the Missionaires of Charity who were preparing for their final vows in Calcutta India in 1997. This audio is a half hour extract from that talk which is a response to a question: What do you mean by this statement, "The physical property of Christ's human nature is present in the Holy Eucharist?" on 11/29/97 Class #3 on the Sacrament of the Holy Eucharist and the document "Mysterium Fidei".