I stumbled across this article by Sandra Lipsitz Bem that talks about Stoicism and REBT:
I think of patients much the same way as I think about myself. I am human. I make mistakes. People who come to therapy are just people who are trying to figure it all out and maybe they did not have parents or teachers who helped them to understand themselves. Sometimes we simply need someone to talk with, to reflect our minds and by so doing help us to know ourselves a little better. If another person takes the time to reflect back to people, like a mirror, what another perceives (not what the therapist thinks or judges to be right or wrong) then people can learn, adapt, and have a different outcome. This is more effective than simply following an ideology, although that has its place. We need, like narcissus, to see our own reflection in a still pond. A good therapist is like that still pond, calm.