About allowing or not to be influenced

Situations of changing are typical and revealing: we want them and, at the same time, we fear them.
A slight fear is enough: then we seek some kind of advice.
It is clear that unsolicited – and not desirable – influences are out.
Usually they come from those who have a pre-established competence and power to influence: the boss orders, the teacher tells us what and how to do and the judge gives the sentence. In so doing, they are far from consultants, although in many other situations, in their goings-on, they are essentially consultants.
Vendors are all the time, giving advice; but they usually pass the limit (fact appellant in such profession) and want to push what we do not want.