Aelred of Rievaulx was an English Cistercian monk, abbot of Rievaulx from 1147 until his death, and known as a writer. He was born in Hexham, Northumbria, in year 1110, one of the three sons of Eilaf, priest of St Andrew's at Hexham.

He had spent several years at the court of King David I of Scotland in Roxburgh, possibly from the age of 14, rising to the rank of echonomus ("steward" or "Master of the Household").

In 1138, when Rievaulx's patron, Walter Espec, was to surrender his Wark on Tweed Castle to King David of Scotland, Aelred reportedly accompanied Abbot William of Rievaulx to the Scottish border to negotiate the transfer. He saw that his reluctance to part from his friends at court, delayed his adopting his monastic calling. For Aelred, the source and object of true friendship is Christ.

In 1142 Aelred travelled to Rome, alongside Walter of London, Archdeacon of York, to represent before Pope Innocent II the northern prelates who opposed the election of Henry de Sully, nephew of King Stephen as archbishop of York. After the visit, Aelred brought back a letter from Pope Innocent summoning the superiors whom Aelred represented to appear in Rome the following March to make their deposition in the required canonical form.

Upon his return from Rome, Aelred became novice master at Rievaulx. In 1143, he was appointed abbot of the new Revesby Abbey, a daughter house of Rievaulx in Lincolnshire. In 1147, he was elected abbot of Rievaulx itself, a position he was to hold until his death. Under his administration, the abbey is said to have grown to some 140 monks and 500 conversi and laymen.

Alongside his role as a monk and later abbot, Aelred was involved throughout his life in political affairs. The fourteenth-century version of the Peterborough Chronicle states that Aelred's efforts during the twelfth-century papal schism brought about Henry II's decisive support for the Cistercian candidate, resulting in 1161 in the formal recognition of Pope Alexander III.

Aelred wrote several influential books on spirituality, among them Speculum caritatis ("The Mirror of Charity," reportedly written at the request of Bernard of Clairvaux) and De spiritali amicitia ("On Spiritual Friendship").

He also wrote seven works of history, addressing three of them to Henry II of England, advising him how to be a good king and declaring him to be the true descendant of Anglo-Saxon kings.

In his later years, he had suffered from kidney stones and arthritis. Aelred died on 12 January 1167 at Rievaulx.

De spirituali amicitia (Spiritual Friendship), considered to be his greatest work, is a Christian counterpart of Cicero's De amicitia and designates Christ as the source and ultimate impetus of spiritual friendship. Friendship was a recurring theme in Christian monasticism. Gregory of Nazianzus, echoing Aristotle, describes his friendship with Basil the Great as "two bodies with a single spirit".

Aelred was never formally canonised in the manner that was later established, but he became the centre of a cult in the north of England that was officially recognised by Cistercians in 1476. As such, he was venerated as a saint, with his body kept at Rievaulx. In the sixteenth century, before the dissolution of the monastery, John Leland, claims he saw Aelred's shrine at Rievaulx containing Aelred's body glittering with gold and silver. Today, Aelred of Rievaulx is listed as a saint on 12 January, the traditional date of his death, in the latest official edition of the Roman Martyrology, which expresses the official position of the Roman Catholic Church.

Other Saints of the Day
1. Saint Marguerite of Rievaulx
2. Saint Anthony Mary Pucci
3. Saint Benedict Biscop
4. Saint John of Ravenna
5. Saint Tatiana of Rome

- catholic.org