In the first reading God compared himself to a potter who can make something new of our clay if we are not useful.
Let me burden you with an account of my own experiences with potters. In Korea, back in 1860 the government banished all Christians from the province around the capitol and its farmland; and many of those people took to using the mountainside clay for making pottery.
After 1955 when I was sent as the lone priest to that hill country I found that every Catholic village was engaged in making pottery, and I often used a plank spanning two large pots for my altar.
I often saw potters doing what Jesus did. If the vessel they spun out of the clay was faulty the, potter used the clay for something better.