Paul's letter to the church at Ephesus speaks of mysteries hidden from the foundation of the world. It also heavily emphasizes love.
Ephesians 1 - The Guarantee
In this introduction, Paul writes of the glory and power that God exhibited in raising Christ from the dead. He also writes of the spiritual blessings and the inheritance that await believers. The Spirit being the guarantee of the inheritance promised in the fullness of time.
In Christ the separation and hostility between Jews and believing gentiles has been abolished. Now gentiles can be citizens of the Commonwealth of Israel and children of God. What does it mean to be a citizen of the Commonwealth?
In several of his letters Paul refers to mysteries. In all cases they allude to the same thing; that gentiles are full members of the Kingdom of God and are fellow heirs. It is the case that if the spiritual rulers and authorities had realized that would happen, they never would have allowed the Crucifixion.
Paul emphasizes unity in the community. Christ gave gifts to men that those having the gifts might use them to build a strong community around the knowledge of Christ and His Kingdom. To be healthy, the members of that community must care for one another.
In contemporary American usage, 'love' is heavily bound up with emotion and romance. Not so in the Torah or in Paul. The command to, 'Love your neighbor as yourself.' might be usefully rendered, 'Care as much about your neighbor's welfare as you do about your own.' Read in that light, Ephesians 5 becomes commentary on the Torah's instruction to love your neighbor.
After giving advice on how to create and maintain a healthy, caring community, Paul concludes the letter with instructions for remaining personally effective in the great spiritual battle. In this, he draws on Isaiah and the Psalms to explain what each piece of the believer's equipment is to accomplish.
