Sri Rudram and the Purushasuktam are a pair of mellifluous Vedic hymns that can readily waft us to ethereal spiritual heights. Text with word-for-word meaning and brief notes from classic Sanskrit commentaries.
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