"Stand therefore, having your loins girt about with truth, and having on the breastplate of righteousness; And your feet shod with the preparation of the gospel of peace; Above all, taking the shield of faith, wherewith ye shall be able to quench all the fiery darts of the wicked. And take the helmet of salvation, and the sword of the Spirit, which is the word of God: Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints;" (Ephesians 4:14-18)
Truth, rightheousness, evangelism, faith, salvation, the Word of God, and prayer makes up the whole armor of God. It is an easy temptation to neglect these items on the account of our familiarity with them. The list is not enumerated in the order of importance, but rather every aspect of the panoply of God is of equal importance. Although each of them are clearly distinct terms with their own individual meaning they must be viewed by Christians as a whole. In all reality we either put it all on or we don't have it at all.