Marcellus of the Virgin of Carmel was born in Kiskomárom (now Zalakomár), Hungary, on September 9, 1887.

At the age of 38 he left everything to enter Carmel definitively. After his ordination he was appointed master of novices and in this role he expressed himself wonderfully as a father, mother, brother, spiritual director, and teacher towards his students.

He became famous in Hungary both as a preacher and as a confessor, becoming spiritual director of various ecclesiastical authorities.  In 1950, his Father Provincial gave him a month's vacation to write the history of his life, answering mainly the basic question of what influence the Virgin Mary had upon his soul. Thus he could better rediscover himself by turning his gaze back to his youth.

The suppression of religious orders in 1950 forced him to leave the monastery, but his hope was unshakable and, from some testimonies collected, it could be seen that he showed a security and certainty completely incomprehensible to most religious. He even made a vow of love, now convinced that nothing could separate him from the love of God.

Father Marcellus had to adapt to living in a family, sharing the room, and having to practice an even narrower poverty than that of the monastery. He could not preach nor celebrate Mass, (which he did however, secretly). He lost the gift of hearing, but even if sick he did not feel useless, indeed he tried to be more receptive to external news, without focusing on his evil. He absorbed the news that came from Rome. In particular, he wrote in his diary the papal speeches, the insights of the Council Fathers about the liturgical reform and the re-evaluation of the role of the laity within the Church.

He died on May 29, 1966 in Budapest, at the dawn of Pentecost Sunday, the feast of Divine Love and his confreres saw in this coincidence an unequivocal sign that the Most Holy Trinity had finally welcomed him into their embrace. 

The decree on his heroic virtue was promulgated on December 9, 2013.