Born into an ethnic Hungarian family in Prisian (Perestyén) in what is now Caraş-Severin County, he began his studies at the Piarist High School in Timișoara.
His father objected to his wish of becoming a Jesuit, and so he continued his studies in Târgu Secuiesc.
He began his theological education at the Roman Catholic Theological Institute of Alba Iulia before continuing in Rome from 1929 to 1937, being ordained a priest there in 1935.
From then until 1949, he taught World War II refugees at Zirc.
[1] Erőss published a number of theological works.