He underwent a profound spiritual transformation that led him to renounce his privileged life in favor of monasticism and, eventually, the episcopacy. His journey began with deep engagement in religious texts, particularly the letters of Paul the Apostle.

Meditating on St. Paul’s teachings - which emphasized the fleeting nature of worldly pleasures and riches - Eucherius came to view earthly enjoyments as “mere empty shadows that deceive us and vanish away.” In 714, he entered the Abbey of Jumièges, located on the banks of the Seine in the Diocese of Rouen, where he devoted himself to prayer, study, and penitential austerities for six or seven years. His reputation for holiness and wisdom grew significantly during this period.

Following the death of his uncle Suavaric, Bishop of Orléans, the clergy and people of Orléans sought Eucherius’s election to the vacant see. Despite his initial reluctance and desire for solitude, Charles Martel - the mayor of the palace and de facto ruler of the Frankish Kingdom - granted their request. Thus, in 721, Eucherius was consecrated Bishop of Orléans.

As bishop, he tirelessly worked to reform the clergy, promote education, and care for the poor. However, his strong opposition to Charles Martel’s policies - particularly the confiscation of church property to fund military campaigns against Moorish invasions - led to his eventual exile. Even in banishment, Eucherius continued to inspire and guide others through his teachings and letters, spending the remainder of his life in prayer and contemplation at the monastery of Sint-Truiden (also known as St. Tron’s or Sarchinium), where he died in 743.