St. Kevin of Glendalough (498-618 A.D.) lived in Ireland during the age of the great early Irish saints, many of whom were his contemporaries. He was baptized by St. Cronan, and from age seven was taught by St. Petroc. From age twelve he studied under the Irish monks as a student of St. Eonagh, and eventually became a monk himself. Among his friends were St. Comgall, St. Columba, St. Cannich,...

St. Justin Martyr (100–165 A.D.) was a pagan philosopher from Samaria. After meeting a Syrian Christian who convinced him that the biblical prophets were more trustworthy in the pursuit of truth than worldly philosophers, St. Justin renounced his paganism and studied Sacred Scripture. The bold witness of the early Christian martyrs led to his own conversion to the Catholic faith. St....