St. Aidan studied under St. Senan, one of the great Irish monk-saints, and he became a monk at Iona in about the year 630. His obvious virtues caused him to be selected as first Bishop of Lindisfarne in 635.
Lindisfarne is an island of about one thousand acres, and is off the northeast coast of England. It served as a home base for the evangelizing of the mainland, and in time St. Aidan became known as the "apostle of Northumbria," because the king of Northumbria, Oswald, asked him to come and spread the Christian faith among the people. St. Bede spoke highly of the spiritual care given by St. Aidan to his people. King Oswald had studied in Ireland and because of their common spiritual heritage he eventually became a close friend of St. Aidan, supporting him in his work to the end of his life.
St. Aidan died at Bamborough on 31 August 651, and his remains were taken to Lindisfarne. St. Bede writes that "he was a pontiff inspired with a passionate love of virtue, but at the same time full of a surpassing mildness and gentleness."
O Everlasting God, who didst send thy gentle Bishop Aidan to proclaim the Gospel in Britain: grant that, aided by his prayers, we may live after his teaching in simplicity, humility, and love for the poor; through Jesus Christ thy Son our Lord, who liveth and reigneth with thee, in the unity of the Holy Spirit, ever one God, world without end. Amen.