Answer:
Soldiers line up spaced with pride. Two long rows lined side by side. One sole unit can decide, if the rows will unite or divide.
What can you put in a barrel to make it lighter?
What can be filled with empty hands?
Both punishment and sweet reward, It will befall both fool and lord. It is a spiritual scoreboard, Your every deed it does record.
Has no feet, but travels far. Is literate, but not a scholar. Has no mouth, yet clearly speaks.
What an fill a room but takes up no space?