Monastic Formation
According to the tradition recorded in the synaxarion, Euthymius entered monastic life at the Caves monastery near Nizhny Novgorod, where Saint Dionysius received his tonsure and became his spiritual mentor. He was noted for an austere regimen of prayer, vigil, and fasting, which he sought to keep hidden from his fellow monks. Sources relate that Dionysius at times counseled him to moderate the severity of his ascetic labors.