He made his first profession on 21 October 1934,[2] and he studied philosophy and theology at the St Thomas Aquinas College in Rabat[3] before being ordained a priest on 11 June 1939.
[2] During World War II, he was at the Dominican convent in Birgu when it was partially destroyed in January 1941 by aerial bombardment aimed at the British aircraft carrier HMS Illustrious which was in the nearby harbour.
Fsadni and the other Dominican friars subsequently moved to the Rabat convent and to a house in Birkirkara before returning to Birgu and staying within the Inquisitor's Palace.
After the war, Fsadni was assigned to the Santa Marija tal-Għar convent in Rabat, where he remained for the rest of his life.
He was awarded Ġieħ il-Birgu on 7 September 2000,[2] and on 13 December 2008 he received the title of Member of the National Order of Merit.