Psalm 119:11

 

I have stored up your word in my heart,

that I might not sin against you. (ESV)

 

 

In Matthew 4, Jesus responds to temptation by answering the devil:

 

4:4 – "It is written…" from Deuteronomy 8:3.

 

4:7 – "Again it is written…" from Deuteronomy 6:16.

 

4:10 – "For it is written…" from Deuteronomy 6:13.

 

 

The Word of God is the sword of the Spirit with which we parry the temptatious advances of the devil. (Ephesians 6:17)  A heart void of God's Word is a swordless sheath.