I found this thread interesting even though I haven't read all postings from the beginning. I'm a silent reader as well and I'm hoping that I don't have to wait too long for it to complete. To speed up the process, if it helps, I'm going to answer Vishontar ji's questions. To learn/research something, a person must be very disciplined, attentive, and critical. On top of that there must be a favorable environment. Also, willingness to learn and interest in the subject matter is necessary. Okay that's more than three now. :)