 Along these lines, the ancient historian Josephus emphasized practices and observances rather than religious beliefs, associating apostasy with a failure to observe Jewish law and maintaining that the requirements for conversion to Judaism included circumcision and adherence to traditional customs.Maimonides' principles were largely ignored over the next few centuries.Later, two poetic restatements of these principles (""Ani Ma'amin"" and ""Yigdal"") became integrated into many Jewish liturgies, leading to their eventual near-universal acceptance.