The term "Right-hand Path" for the Christian means Path of the Disciple. Those outside the Christian Faith will employ it differently in accordance with their particular belief system. For example, there are groups, esoteric in nature, which adhere to a certain set of characteristics. Namely, they divide the concepts of mind, body and spirit into three separate, albeit interrelated, entities. They adhere to a specific moral code and a belief in some form of judgement, such as karma or the Threefold Law. The occultists Dion Fortune and William G Gray considered non-magical Abrahamic religions to be RHP.
For Christians it refers to those who have taken up their cross to follow Our Lord Jesus Christ. "And he who does not take his cross and follow after Me is not worthy of Me." (Matthew 10: 38)