Time will Tell; if you do not
It is very important to know and grow your personal value. Taking ownership of the manner in which you conduct yourself will help your leadership/management style be genuine, reliable and productive.
Yes. When someone is given a position of power, the manner in which they commence to conduct themselves will soon follow. Power can be used for good or for personal gain. I am taking this tutorial to assess my strenghths and weaknesses so I can own either - as it is true, you can only trust yourself.
I like what you say about "taking ownership of the manner in which you conduct yoursefl" as much as we would often like to blame our behavior on someone else, it all boils down to being responsible for our own actions.