" Indeed, the capacity to tolerate uncertainty is a prerequisite for the profession. Though the public may believe that therapists guide patients systematically and sure-handedly through predictable stages of therapy to a foreknown goal, such is rarely the case: instead, as these stories bear witness, therapists frequently wobble, improvise, and grope for direction. The powerful temptation to achieve certainty through embracing an ideological school and a tight therapeutic system is treacherous: such belief may block the uncertain and spontaneous encounter necessary for effective therapy. "

― Irvin D. Yalom , Love's Executioner and Other Tales of Psychotherapy