Because they HANG AROUND.
In a wobbly stack of old photos in my childhood bedroom, two layers deep, I found this:
I've been feeling low: not much practice, not much songwriting; a lot of grocery shopping, a lot of cooking, a lot of taking care of Mom.
Practicing not scales and tunes but humility, patience, suffering, service.
So unearthing this postcard -- from April 18, 2010 -- was a balm for these days of deferral, and, yes, sometimes, discouragement.
Why Postcards? What do they mean to me? See the Postcard Project FAQ.