I heard of desperate persons who were suffering all their lives,is that true that only thing they have left ..

Question

IS CURSING THEIR TORMENTORS?MAYBE THEIR CURSE WILL COME TRUE IN FUTURE?

Answer 1

What goes around comes around.  Maybe not in this lifetime but the next.  The true magic is getting through it or passing on to the other side for release.  

If those cursed feel somewhere in their soul they are guilty, the curse may work.  But if they do not believe they are wrong deep in their souls, then probably nothing.  For all things, to believe is the real strength of magic.

We walked on the moon.  We believed.

Answer 2

for magic to work there must be a need and a very strong desire to have it so the more pain the person feels the more power is in the spell!! so maybe But what you put out into the universe  you get back 10 fold so a bad spell (curse) would hurt your Carma