Because a Soldier that does not know his weapon, is a target.

^{Romans 8 35-39} 

Who shall separate us from the love of Christ? shall tribulation, or distress, or persecution, or famine, or nakedness, or peril, or sword?

³⁶ As it is written, For thy sake we are killed all the day long; we are accounted as sheep for the slaughter.

³⁷ Nay, in all these things we are more than conquerors through him that loved us.

³⁸ For I am persuaded, that neither death, nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come,

³⁹ Nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord