What is sadness

  If you could draw sadness,what would it look like
Would it be a colour,such as red or just black
Would it be a razor-sharp blade like the one still in my back
Perhaps just a tear would be all that it took
Perhaps just a whisper
Perhaps just a look
  Could you taste it,smell it,or hold it in your hand
Or would it fall through your fingers like the finest grains of sand
 Sadness at first does seem so harmless
All the better to disarm us
All the better to disarm us
 So if you wish your soul to keep
Hold onto it tightly for
Sadness
Runs
Deep