Answer:
Words come out of it, aligned in perfect silence. A messenger of black on white, a slinky fellow drawing lines, of thin and soft graphite
Written on with words of white, Has the color of the night, Is the teacher's best delight, And a student's daily fright
What divides by uniting and by dividing?
Cows do this to salt and humans do it to ice cream.
I cannot be used until I have been broken. What am I?
What is always coming but never arrives?