If you do adequate preparation, keep an open mind and expect the session to go well, it probably will. The converse also occurs. If you expect it to go badly, your pessimism will show through, and you are unlikely to connect and get a good outcome.I believe I have an open-minded, eager and optimistic approach as a facilitator. This is not the only way to facilitate, but it is the only way that works for me.
For those unfamiliar with Yoda, you might like to watch this video. (Or a shorter version of the same message here.)