when Ego blinds Devotion in Hinduism

Ravaan was a very knowledgable Priest but his arrogance led to his downfall

Bajrangbali Ji was the 11th Rudra avatar of Shiva

Ravaan was a very big devout of Lord Shiva he even composed some hymns on his name

but when he saw Hanuman he couldn't recognize his own God he loved

This means God could come in many different shapes and forms to test us