Dr. Fuhrman considers blackberries one of the healthiest foods on the planet. He's also a big fan of finding pleasure in food. On the NPR website, there is a transcription (and a live recording by the author) of Nobel prize winning poet Seamus Heaney's poem "Blackberry Picking."
At first, just one, a glossy purple clot among others, red, green, hard as a knot. You ate that first one and its flesh was sweet like thickened wine: summer's blood was in it leaving stains upon the tongue and lust for picking.
It's worth hearing the whole thing. Anyone who has ever picked blackberries will know what he's talking about.