I would go more with " out Damned spot" or "Screw your courage to the sticking place". I think therapists would find out a lot about a person if they asked clients what shakespeare quotes most reminded them of therapy.
I would think the way to approach someone who said "My daughter, oh my ducats..." would be very different from someone who chose "What's past is prologue" or "There is no evil angel but love" from "But, O, how bitter a thing it is to look into happiness through another man's eyes"