Sergius of Radonezh

Reading from the Synaxarion:

Our righteous Father Sergius was born in Rostov, north of Moscow,
about the year 1314. Named Bartholomew in Baptism, he was brought up in
Radonezh, and at the death of his parents he withdrew to the wilderness to
become a monk. It is notable that without having been trained in a
monastery, he was of such a spiritual stature as to be able to take up the
perilous eremitical life from the beginning, without falling into delusion
or despondency. When he had endured with courage the deprivations of
the solitary life, other monks began to come to him, for whom he was
made abbot against his will. On the counsel of Philotheus, Patriarch
of Constantinople, he organized his monks according to the cenobitic
life, appointing duties to each. While Anthony and Theodosius of Kiev,
and the other righteous Fathers before Sergius, had established their
monasteries near to cities, Sergius was the leader and light of those who
went far into the wilderness, and after his example the untrodden
forests of northern Russia were settled with monks. When Grand Duke
Demetrius Donskoy was about to go to battle against the invading Tartars,
he first sought the blessing of Saint Sergius, through whose prayers
he was triumphant. Saint Sergius was adorned with the highest
virtues of Christ-like humility and burning love for God and neighbour,
and received the gift of working wonders, of casting out demons, and
of discretion for leading souls to salvation. When he served the
Divine Liturgy, an Angel served with him visibly; he was also vouchsafed
the visitation of the most holy Theotokos with the Apostles Peter and
John. He was gathered to his Fathers on September 25, 1392. At the
recovery of his holy relics on July 5, 1422, his body and garments were
found fragrant and incorrupt. His life was written by the monks of
Epiphanius, who knew him.