I mean mood, environment, and such, then you can accomplish great feats. If one is able to do what there mind desires most, then you can do more. One's point of view is everything. The state of mind can control everything. If one were to know what you were getting into every time you went into it, half the time you wouldn't go into it.
Fear can control anyone, no one is immune to it.
Of course, it works the other way as well. With the proper knowledge, and attitude, anything is possible. One's power is only limited by the mind, and their own desire. I have found that one's desire is different from what they want. There is a thin line between the two.