I trusted my therapist from the second she opened her mouth and responded to me.
Not that I trusted her with my life, or instantly formed a deep and meaningful bond to her. But rather that single strand of trust sprouted up as soon as she validated my point of view && demonstrated her composure, ease and competence. It was a back-and-forth exchange and she met me where I was.
There are various threads that are slowly untangling to form a tapestry. I trust that she does not want to hurt me. I trust that she is able to view me objectively and does not view me as evil (this one took a lot of work -> that is trust. It's been a year, now, since I've been seeing her.)
Because of her prior experiences in forensics && the way she discusses (vague, non-detailed) past clients who have been perpetrators of violent & sexual crimes. I'm slowly starting to trust based upon the way she conducts herself that she is not judging me harshly, but rather attempting to get us on equal footing with reality.
I don't fully trust that she doesn't secretly believe that I'm amoral or without a conscience, or a liar, or a psychotic or a piteous creature & that she will decide she can't help me & terminate me without warning. I have an impossible time opening up and being vulnerable and emotional before her.
The one time I teared up moved her to tears in response because it had been a year of detached garbage trauma vomiting beforehand. But the thing that really sticks out to me, with therapists, is that gut cinch. When you find the one, you'll know it immediately. The rest of it is just construction && window dressing.
Think of it like this: trust isn't an emotion, as much as it's a modal of expected behavioral probabilities.