He was ordained a priest on July 1, 1900 and was sent to New Antwerp (now Makanza) in the Congo on September 1 of the same year.
On that day he was appointed Apostolic Vicar of Lisala as a result of the reorganization of the Congolese dioceses, which he remained until his death.
Sometimes criticism is voiced that de Boeck introduced Lingala everywhere and displaced the local languages.
This may be partially true, since the limited possibilities of the missionaries did not allow them to write textbooks for over 200 languages.
[2] The Égide-de-Bœck cultural centres in Mongala, Équateur and Southern Ubangi are named after de Boeck.