Ahmad,
what you may feel is absolutely justified. I believe all thals have such crisis sometime during their lives. When you face thal, it is normal to wonder why you have to face it and try to find an answer. The important thing,though, is to rise above it and proceed with your life.
As Andy very well puts it, you must "rule thal". That's the point. And you are going to do that, only if you develop your personality and do not let thal be an obstacle.
My idea is that...that's life. We face thal, other people face more difficult situations than ours.That's life. Personally I never thought that God wanted to test me for something. And if I was born again, of course I would prefer to be healthy instead of thal. Then again, if someone asked me: "do you prefer not to be born at all, instead of be born a thal?", my answer would be: "I prefer to be born a thal than not to be born at all." Because life has made me fight for my health, but life has also made me enjoy other things that a lot of people on this planet are deprived of.
Thal is our way of life. We have to accept it and rise above it.That's life and life is beautiful, no matter what.
Lena.