Ephesians 6

Therefore take up the whole armor of God, that you may be able to withstand in the evil day, and having done all, to stand. Stand therefore, having girded your waist with truth, having put on the breastplate of righteousness. vv.13-14

Read chapter 6
Stand!  It's the stance we are to take as believers in Christ.  We're not to sit by and let the enemy take over.  Most times God just wants us to show up and He'll do the rest.  We're to stand with God's armor for the battle we're actually fighting is not against flesh and blood but the powers and principalities of darkness that was just mentioned in the previous verses (vv.10-12).  
Bible Teacher Otis Q. Sellers puts it this way:

God expects us to stand, and not surrender or lie defeated before the enemy. The participles show that the armor is to be put on before we attempt to stand. The Greek for waist is osphus, meaning hip, loins, the part of the body surrounded by the girdle. We are to surround ourselves with that which is the truth. The Lord Jesus said, "I am the truth" (John 14:6) and "Thy Word is truth" (John 17:17). This is first mentioned in this list of equipment, because the living Word and the written Word are of the utmost importance. (Seed & Bread, Ephesians Chapter 6)

Now the list of armor is a well known one taught in Sunday school of being a solider for God.   Which armor do you have a hard time putting on?  Are you sitting with armor on?  Are you trying to stand with no armor?