How did St. Ambrose work with Emperor Theodosius I despite their disagreements?

St. Ambrose and Emperor Theodosius I maintained a complex relationship characterized by both significant conflict and mutual cooperation. While Ambrose was intent on forming a friendship with the emperor, he did not hesitate to clearly define the limits of imperial power, often challenging Theodosius on moral and religious grounds.1

Their cooperation was facilitated by Ambrose’s role as a loyal and resourceful diplomat, as well as his ability to influence the emperor’s religious policies. Despite their disagreements, Theodosius maintained a friendly attitude toward the church and eventually acceded to the bishop’s wishes on several matters, such as the punishment of those who burned a synagogue.12

The most notable instance of their interaction occurred in 390, when Ambrose condemned Theodosius for a brutal massacre in Thessalonica and required him to perform public penance. Theodosius complied, and this act of atonement—rather than signaling a victory of church over state—demonstrated the power of repentance. Following this, Theodosius continued to value Ambrose as an important ally, even while remaining firm in his commitment to preserving imperial authority against the influence of bishops.134