The "Song of the Free", a classic text of Advaita Vedanta expresses the highest experience of the unfettered Self. Sanskrit text, transliteration and English translation. One of the purest statements of the supreme knowledge of Advaita, by a sage who lived over three thousand years ago.
Those who work at a thing heart and soul not only achieve success in it but through their absorption in that they also realize the supreme truth -- Brahman. Those who work at a thing with their whole heart receive help from God.
-Swami Vivekananda