Superlative gospel group the Blind Boys of Alabama formed in 1939. When I first saw them, in 2002, I think, I remember feeling lucky. Not only did they have an energy and a self-percolating vibe to go along with those spiritualized vocals, but it was also one of those "No telling how long these guys will be with us" situations.

I saw them a second time opening for Peter Gabriel a few years later and, again, felt blessed. Not all the original members were alive, but the replacements were just as fervent and talented. And yet, I speculated I'd probably seen them for the last time.

Well, heck. Saturday, in the Mohegan Sun Wolf Den, the Blind Boys of Alabama will perform again — and it's worth noting that, last week, the act received a Grammy nomination in the Best American Roots Performance for their song "I Wish I Knew How It Would Feel To Be Free" featuring Bela Fleck.

For many reasons, this is a fine opportunity to see one of the finest gospel groups in the world. Don't worry, though. It's not like they're going anywhere.

Blind Boys of Alabama, 8 p.m. Saturday, Mohegan Sun Wolf Den; free; www.mohegansun.com.