All Catholic catechisms state that a deacon is 1) a man in Holy Orders, 2) consecrated to the ministry of service, 3) may lead and conduct services except the Mass and hearing confessions. He can solemnize weddings and conduct funerals and is the cleric that proclaims the Gospel at Mass 4) may have a wife. There are two kinds of deacons, the transitional one and the permanent one. The transitional deacon is in a sort of probationary training for the priesthood. Later on he will be ordained as a priest. The permanent ones will remain deacons for the rest of their lives. All the deacons I know are permanent ones and one is married. Deacon Jody in Baton Rouge is a lawyer with a flourishing practice. He is married and with two grown-up kids. Deacon Paul in Australia is unmarried and is involved with university and crisis ministries. If a deacon is ordained as an unmarried man, he is vowed to celibacy. If a deacon is ordained as a married man, he is vowed to matrimony. Perhaps nothing shows...
"It is surely harmful to souls to make it a heresy to believe what is proved" - Galileo