The difference between manipulation and persuasion

Dave over at Marketing - The Bold Approach Method recently posted about persuasion and how it differs from manipulation. Here is what he says:

In a word the difference is intent. Manipulation is inwardly focused on what you can get another person to do for you regardless of the outcome for them......true persuasion is doing the things that impact people on a subconscious level and gets them to take actions that they are socially programmed to take. And we do it because they've, and this is important, they've raised their hand and asked to be moved from one place (confusion, ambiguity) to another (new homeowner, member of your church).

Well, I think that it might be a bit more complex than this, but what I do like is this: Manipulation has no concern whatsoever for the common good. Persuasion, on the other hand, involves working with others so that what is best for the organization/cause/etc. is laid out on the table, discussed, and everyone involved agrees that this is the best direction for everyone involved.