In Krutha yuga a Spider with its immense devotion worshipped the Lord by Weaving Temple with the glue-thread from its body. Lord Shiva desired to test Spiders Devotion.He burnt the web-temple with Lamp. On seeing this calamity the spider was perturbed and with wild anger it ran to swallow the fire.Looking at this act of Spider,the compassionate Lord Shiva gave Sayujya Mukthi( merging with Lord) to Spider at its request.Thus a Spider even though an insect had Salvation because of its mere Devotion