It was the song Black-Throated Wind, performed by the Grateful Dead. It was part of a run of songs from a show (I think in 1977?) featured today on the Today In Grateful Dead History show on Sirius Radio's The Dead channel.
I had tuned in around 7:30 this morning (after listening to news for most of my commute). I came in during the jam between China Cat Sunflower and I Know You Rider (China/Rider to aficionados). The final song in the run was Black Throated Wind, but I had to cut it off during a second time through the chorus:
The black-throated wind keeps on pouring in.That must have been at about 7:36 a.m. As it happened, I came back out just at 11:36 and turned the car on at exactly the same spot in the song. It freaked me out for a moment until I remembered that This Day in Grateful Dead History runs at 7 and 11 in the morning, and at 7 in the evening.
And it speaks of a life that passes like dew.
It's forced me to see that you've done better by me,
Better by me than I've done by you.
So I got to listen to the rest of the tune, including one of my favorite lines:
You ain't gonna learn what you don't want to know.