I think, like others have said, that it really just depends on the person and what that individual needs.

For ME, positive moments and connection have been a HUGE help. I've never felt really understood, so I have gone through life trying to defend my every decision, and changing myself in every situation so that I could feel like others would understand me. Having a T that I felt a connection with has allowed me to stop hiding behind masks and actually be myself and work through things. Because I have such a history of "negative moments," learning to recognize positive moments , and allow myself to really experience them has also been helpful.

In my mind, "trust the relationship" is not about it doing something, but trusting that it can withstand whatever is brought up in therapy. It's trusting that it is a safe relationship, where you can explore who you are without worrying about the other person, their needs, their wants, etc. I suspect that not everyone needs to "trust the relationship," and for those that do, even the meaning of trust may be different for each person.