Tears are words the mouth can't say nor can the heart bear.

Don't cry over someone who wouldn't cry over you.

Failure is the sourness that makes success All the more sweeter.

Oh, dry the glistening tear that dues that marshal cheek
Thy loving childern here in them thy comfort seek
With sympathetic care their arms around the creep,
For oh they can not bear to see their father weep

The tears stream down my cheeks from my unblinking eyes. What makes me weep so? There is nothing saddening here. Perhaps it is liquefied brain.

Silent tears are the worst. It's the sign of a broken spirit. No sound, no residual emotions... just tears. Silent, unstoppable tears.