First, let me tell you that in Hinduism, the symbols have been used from time immemorial. Symbolism is an important way in Hinduism for realization of divine knowledge. But, the science of symbolism has not been laid down, principle-wise, openly in any of the Hindu scriptures. It has to be patiently, devotedly and humbly studied. The degree and the manner in which this science has been imparted and understood have varied according to the capacity of those who have received it. There are many opinions about and explanations of such symbols. Even famous idols and images vary on the point of detail. For example, the image of Durga shown in this post has eight arms but Durga’s image of 10 arms is also very popular .