You must put on the following:
1. The helmet of salvation- to protect your mind
2. The breastplate of righteousness
- to protect you heart
3. The belt of truth
- to hold yourself together
4. Your feet shod with the readiness of the gospel of peace
- to protect you while you walk on rough ground
5. The shield of faith
- to ward of and deflect the enemy's fiery darts
6. The sword of the spirit, which is the word of God
- to attack the enemy with
You may notice, the full armour of God does not cover your back - you don't need it - you either stand your ground or attack and advance - the Lord our God protects your rear. A simple definition of 'sword' is 'a hand held weapon', so is the Bible, which is the word of God!