My approach is tailored to my clients, their needs, and their goals. People that come to therapy, in my experience, are usually people that at certain points in their lives feel stuck (I've been there too).
Together, we determine goals and ways they could tell "psychotherapy is working".
My faith in the psychotherapeutic process stems from my personal experience as a client, as well as my primary and continued education.
What is crucial is the relationship between the client and the therapist. Not every therapist is going to be a good fit for every client, and not every modality is going to be a good fit. However, there needs to be a balance and, as with everything in life, there comes a point in which we have to accept a certain therapist because they're "good enough" - we either trust their expertise, feel safe with them, see signs of progress, or ideally all three.
As mentioned previously, I encourage my clients to experiment, to let everything out in our safe space, to experiment by saying something out loud (for the first time, maybe), and to try out different behaviors. I encourage them to tell me about whatever's bothering them, even if it's something to do with the way we operate. I rely on my education, but can never entirely predict the outcomes as they depend on all people included in it.