The Whole Armor of God: Sunday School 39

http://www.youtube.com/watch?v=fOh_RIDoMME
This is a link to the movie which is part of the Sunday School lesson this week.  It is an old seminary movie, but very good.  Tomorrow the theme is having Unity in the church, in our marriages, at home and with ourselves.  I am wondering how this fits into the idea of unity.  I know it is important to put on the whole armor of God, as Paul taught:

 11 Put on the whole ^aarmour of God, that ye may be able to stand against the wiles of the devil.

 12 For we ^awrestle not ^bagainst ^cflesh and blood, but against principalities, against powers, against the ^drulers of the ^edarkness of this world, against spiritual ^fwickedness in high places.

 13 Wherefore take unto you the whole armour of God, that ye may be able to withstand in the evil day, and having done all, to stand.

 14 Stand therefore, having your loins ^agirt about with ^btruth, and having on the ^cbreastplate of ^drighteousness;

 15 And your feet shod with the preparation of the gospel of ^apeace;

 16 Above all, taking the shield of ^afaith, wherewith ye shall be able to quench all the fiery ^bdarts of the wicked.

 17 And take the helmet of ^asalvation, and the sword of the Spirit, which is the word of God:

 18 ^aPraying always with all prayer and supplication in the Spirit, and watching thereunto with all ^bperseverance and supplication for all saints; (Ephesians 6)

So those in the class, maybe you can help me with this question of how this relates to unity.