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

Psalm 139:13-18

¹³ For thou hast possessed my reins: thou hast covered me in my mother's womb.

¹⁴ I will praise thee; for I am fearfully and wonderfully made: marvellous are thy works; and that my soul knoweth right well.

¹⁵ My substance was not hid from thee, when I was made in secret, and curiously wrought in the lowest parts of the earth.

¹⁶ Thine eyes did see my substance, yet being unperfect; and in thy book all my members were written, which in continuance were fashioned, when as yet there was none of them.

¹⁷ How precious also are thy thoughts unto me, O God! how great is the sum of them!

¹⁸ If I should count them, they are more in number than the sand: when I awake, I am still with thee.