The scholars who describe Paul as an apocalyptic theologian will often set "the apocalypse of Jesus Christ" over against "religion."
Here's the distinction.
Religion - Pathway - Humans - God - Pathway
Religion sets out a pathway that humans are to walk to approach God. This pathway generally involves moral improvement, participation in rituals and worship, and engaging in ascetical practices. For example, in the Christian religion we strive to be a good person, work for just causes, go to church, pray and fast.