The Song of My True Self by Shankara
When a young boy of only eight, Shankara encountered a sage who asked him, "Who are you?" The boy answered with these stanzas, which are known as "Nirvana Shatakam" or "Atma Shatakam." Nirvana is complete equanimity, peace, tranquility, freedom and joy. "Atma" is the True Self.
