The Pure Flame movement is prone to zealotry and violence. Arch- bishop Solhar Dariznu and other extremists support torture and execution as ways to guide the masses toward the light. Samyr Kes could easily send assassins to kill Dariznu, but his death could throw Thaliost into deeper chaos, and it might make him into a martyr that would galvanize the Pure Flame into even worse violence. Kes wants to find a way to discredit the fundamental beliefs of the Pure Flame— to dispose of Dariznu and his fellow murderers, but to do so in a way that will draw the archbishop’s follow ers back to the Keeper instead of exacerbating their extremism.
Most believe Miron’s Tears to be an urban legend—an secret order of spies and assassins deep within the Church of the Silver Flame, hidden even from the Keeper and the Cardinals. According to the stories, Tira Miron foresaw the danger of the Shadow in the Flame. On the eve of her battle with Bel Shalor, Tira charged her trusted companion Samyr Kes to monitor the Church that was to come for signs of fiendish corruption—to save those who could be saved, and eliminate those who could not. Those who believe these tales say that it was agents of Miron’s Tears who recognized the threat of Melysse Miron and exposed her as an agent of Bel Shalor.
It’s up to the DM to decide if this order exists or if it died out long ago. If he still lives, Samyr Kes—an elf whose long life has been extended by the Flame—could be disgusted by the corruption of the modern church. Beyond combating fiendish corruption, Miron’s Tears could target greedy priests in Breland, fight the extremism of the Pure Flame in Aundair, or even seek to bring down the Thranish theocracy, seeing it as a corrupting influence on the church. Virtuous player characters could be recruited into the order. Or chaos could ensue when an ally of the player characters—secretly a servant of the Lords of Dust—is targeted by the Tears.
Source: Exploring Eberron
Before Mira Tiron's final battle with Bel Shalor's forces, she knew that the movement she had founded would require shepharding and safeguarding. She entrusted this sacred task to Samyr Kes, an elven paladin of retribution that also loved her deeply. He accepted his role, disappearing into the shadows and faking his own death and sacrifice in that final battle to bind the Shadow in the Flame.
For over 700 years Samyr has run Miron's Tears, a secretive organization dedicated to rooting out corruption within the church. While he would normally be one of the oldest elves alive, The Golden Serpent, a couatl patron of the organization, has preserved his health even into his old age.
Source: Politics of Thrane