"If late Roman amulets are to be believed, than the dangers talking early Christians and their neighbors were manifold and omnipresent. The texts and images on amulets offer protection from disease, pain, aggressive magic, physical attack, and demonic onslaught, as well as other threats to body and soul. Such apotropaic objects were particularly employed when the dangers were beyond the control of individuals, states, or institutions, and when the precise threat was as yet unknown. The texts, forms, and images employed on amulets give shape on the thoughts and concerns that occupied the waking hours and anxious nights of early Christians - subjects that rarely appear in more public artistic media. Importantly for the study of early Christianity, protective amulets display what are thought to be some of the earliest appearances of distinctively Christian symbols, some dated as early as the late second to third century, where they appear alongside Greek, Roman, Egyptian, and Jewish names and symbols. The appearance of Christian symbols among other ritually potent, religiously diverse symbols suggests the gradual emergence of a popular perception that the Christian God and associated celestial beings, saints, names, and symbols were effective when deployed for defense against maleficent forces."
January 1, 1970
https://en.wikiquote.org/wiki/Early_Christianity