> Christians who breathed a sigh of relief when Constantine proclaimed Christianity the state religion, believing this would end the bloodshed and martyrdom. But it was all too short a time until they were facing persecution once more -- from others who claimed to be Christian. > When Christianity became the state religion, many people adopted it for political reasons. Others adopted it without truly understanding it. Under these circumstances heresy found fertile ground. One of the most powerful heresies was Arianism which claimed that Jesus was not God (a heresy that has never completely died out). The Arians were powerful people, including nobles, generals, emperors. They commanded armies and senates. True Christianity was in real danger of being stamped out once again. [continue reading](https://www.catholic.org/saints/saint.php?saint_id=46)