Acknowledging weakness doesn't make a leader less effective. On the contrary, in most cases it is simply a way of expressing that he understands what everyone else has known for some time. When you acknowledge your weaknesses to the rest of your team, it is never new information.
Andy StanleyPreaching on Sunday mornings is such a simple thing, and by complicating it, I think we all do ourselves and the audience a disservice. It is very simple. Here is the model: Make people feel like they need an answer to a question.
Andy Stanley