A PMHNP is facilitating a process-oriented therapy group for adults with major depressive disorder. The group is in its tenth session. A 38-year-old female member who has been notably reserved in previous sessions tearfully discloses that she has been experiencing passive suicidal ideation for the past two weeks. A male member responds, 'I have been there too — last year I could not see any reason to keep going, but being in this group helped me realize I was not as alone as I thought.' A third member adds, 'I had no idea you were struggling that much. I always assumed you were the one in the group who had it all together.' Several group members are visibly moved, and the room falls silent for a moment before others begin to share similar feelings. According to Yalom's model of group psychotherapy, which combination of therapeutic factors is MOST prominently operating in this interaction?