It is believed that it Lord Vishnu's power that protects the Earth and preserves the life on it. There are various Lord Vishnu avatars (manifestations) that are worshiped by Hindus across different parts of the world. The objects He holds in His four arms of Lord Vishnu signify his powers.The lotus signifies spiritual enlightenment, the Sudharshana chakra that signifies dharma, the conch shell which is a war horn, and the ‘gada’, a weapon that signifies his battle with evil.