A Christian who does not study the Word of God will not be able to live to the fullness of what God has promised to him or her. The enemy is trying to steal away our peace, and finally destroy us, hoping we will turn away from God.  

2Timothy 2:15 Do your best to present yourself to God as an approved worker who has nothing to be ashamed of, handling the word of truth with precision. (ISV) 

Here we see we are to study His Word, to be approved workers, which is right, but let us look at the second part of this statement.

               handling the word of truth with precision.

The word precision has an implication of importance and we need to know how to handle it in our defence against the enemy.  We need to understand the Word of God clearly, so that we can extinguish the fiery arrows of the enemy.