Ephesians 6:17

and take the helmet of salvation, and the sword of the Spirit, which is the word of God,

Ephesians 6:17

The helmet of salvation is pretty important.  It protects your head.  Hope in the God of our salvation helps protect us.  There are times when we are discouraged and drawn into deep dark thoughts that we aren't worthy.  We aren't worthy, but it doesn't necessarily mean we're not saved.  We're saved in spite of our shortcomings.

I like the sword of the spirit.  It is with a sword that one attacks his enemies.  When Jesus was tempted in the wilderness, he replied with "it is written...".  The word of God is living and active, and sharper than any sword (Heb 4:12).  It is important.  I'm not sure if this is true, but I think soldiers are taught not to be without their weapons.  So, they even take it with them to the bathroom.  Also, I remember seeing a lot of people in Israel casually wearing their weapon out in public.  Whether or not this is true, I am reminded about the instruction to the Israelites to keep their sword strapped on while they were working on the wall.  As a soldier of God, I want to be read and not be caught without my weapon.  I want to know my weapon and know how to use it.  In any case, the word of God is described like a sword here, and that's pretty cool.