Can you be manipulated?
Are you one of those that feels one way when one person is arguing his view point and feels the other way when the other person expresses his view point?
While there may not be a commandment that gives specific direction in this matter, this wavering nature is best done away with!
I would prefer someone that is consistently arrogant and bull-headed over someone that can be manipulated; at least you know what you are dealing with! You can trust him to cause you harm.
A person that can be manipulated is inconsistent. He does not mean to cause harm, but he can be more harmful, for with him, there was probably a time when you had your guards off and trusted. And since, he got himself speaking with the others who you would rather not reveal yourself to!
There are innumerable historical records where great causes were decimated, thanks to such malleable people!
You will always have good people and bad people. The ones that can be manipulated, believe they are good, and can take the bad side with having no knowledge or thought placed into the repercussions of their actions.
Beware the fickle! If he can be manipulated, you can trust him with nothing!