Questions about the nature of human existence have puzzled the human mind for millennia, for instance, "What is the meaning of my life?" "How do I cope with my mortality?" (e.g., Greenberg, Koole, & Pyszczynski, 2004;Tillich, 1952). For some people, these concerns may evoke such anxiety, uncertainty, and crisis that they may experience severe psychological distress (Yalom, 1980). People may be especially vulnerable to experiencing such distress when they are in boundary situations (Jaspers, 1925)-that is, when they are confronted with issues about their very existence, such as the diagnosis of terminal illness. Many forms of psychotherapy and counseling implicitly help clients to address such existential concerns. However, one group of therapies that explicitly claims to do this-and to help clients develop a deeper understanding of their lived existence within a close relational encounter-consists of the existential approaches to psychotherapy.