I found some other interesting quotes about fear in A Course in Miracles.

The first ones under VIII. Cause and Effect in Chapter_2 are about love and fear:

"Both miracles and fear come from thoughts. If you are not free to choose one, you would also not be free to choose the other. By choosing the miracle you have rejected fear, if only temporarily. You have been fearful of everyone and everything. You are afraid of God, of me and of yourself. You have misperceived or miscreated us, and believe in what you have made. You would not have done this if you were not afraid of your own thoughts. The fearful must miscreate, because they misperceive creation. When you miscreate you are in pain. (...) The fundamental conflict in this world, then, is between creation and miscreation. All fear is implicit in the second, and all love in the first. The conflict is therefore one between love and fear."

"It has already been said that you believe you cannot control fear because you yourself made it, and your belief in it seems to render it out of your control. Yet any attempt to resolve the error through attempting the mastery of fear is useless. In fact, it asserts the power of fear by the very assumption that it need be mastered. The true resolution rests entirely on mastery through love. In the interim, however, the sense of conflict is inevitable, since you have placed yourself in a position where you believe in the power of what does not exist."

And the other ones in Chapter 4 are about ego and fear:

"God is not the author of fear. You are. You have chosen to create unlike Him, and have therefore made fear for yourself. You are not at peace because you are not fulfilling your function. God gave you a very lofty function that you are not meeting. Your ego has chosen to be afraid instead of meeting it. When you awaken you will not be able to understand this, because it is literally incredible. Do not believe the incredible now. Any attempt to increase its believableness is merely to postpone the inevitable. The word "inevitable" is fearful to the ego, but joyous to the spirit. God is inevitable, and you cannot avoid Him any more than He can avoid you."

"The ego is afraid of the spirit's joy, because once you have experienced it you will withdraw all protection from the ego, and become totally without investment in fear. Your investment is great now because fear is a witness to the separation, and your ego rejoices when you witness to it. Leave it behind! Do not listen to it and do not preserve it. Listen only to God, Who is as incapable of deception as is the spirit He created. Release yourself and release others. Do not present a false and unworthy picture of yourself to others, and do not accept such a picture of them yourself."