In Hinduism, Lord Vishnu is one of the most important deities, and he is often depicted holding the Sudarshan Chakra, which is a disc-like weapon with sharp edges. The Sudarshan Chakra is said to represent the divine power of Lord Vishnu, and it is believed to be an incredibly powerful weapon that can destroy anything.

There are several stories in Hindu mythology that explain why Lord Vishnu holds the Sudarshan Chakra. One of the most popular stories is that the Sudarshan Chakra was given to Lord Vishnu by Lord Shiva, who was impressed by his devotion and dedication. Lord Vishnu was then able to use the Sudarshan Chakra to defeat many demons and evil forces, thereby restoring balance and harmony in the universe.

Another story suggests that the Sudarshan Chakra was created by Lord Vishnu himself, using the energies of the universe. It is believed that the Sudarshan Chakra is a symbol of Lord Vishnu's omnipotence and his ability to control the cosmic energies of the universe.

In summary, Lord Vishnu holds the Sudarshan Chakra as a symbol of his divine power, which he uses to protect the universe and maintain balance between good and evil.

Ramana Maharshi was an Indian Hindu sage and jivanmukta. He was born Venkataraman Iyer, but is mostly known by the name Bhagavan Sri Ramana Maharshi. He was born in Tiruchuli, Tamil Nadu, India. 

A short Biography of Sri Aurobindo.