Some level of TRUST is absolutely required for any kind of non-hostile relationship.
TRUST can have different levels, ranging from very little to nearly absolute.
TRUST needs to be mutual but doesn’t need to be equal both ways.
TRUST is ‘mined’ by getting it from others – from relationships, services, acts of kindness etc. Usually for a good reason.
TRUST is more or less directly connected with the quality of life.
TRUST is nonfungible – as one coming from someone TRUSTed a lot is much more valuable than one coming from someone who’s not trusted.
TRUST is personal – TRUST of person A is not the same as TRUST of person B.
TRUST can be lost/revoked easily. Usually for a good reason.
TRUST can’t be spent – the benefits are coming from accumulating it from others.