Quote from A Course in Miracles Text Chapter 2 - THE SEPARATION AND THE ATONEMENT.

T-2.VI.1. Being afraid seems to be involuntary; something beyond your own control. 2 Yet I have said already that only constructive acts should be involuntary. 3 My control can take over everything that does not matter, while my guidance can direct everything that does, if you so choose. 4 Fear cannot be controlled by me, but it can be self-controlled. 5 Fear prevents me from giving you my control. 6 The presence of fear shows that you have raised body thoughts to the level of the mind. 7 This removes them from my control, and makes you feel personally responsible for them. 8 This is an obvious confusion of levels.