Hell - Words used in A Course in Miracles

A Course in Miracles uses the metaphors of heaven and hell to contrast how the ego uses fear to keep us imprisoned, compared with how Truth is experienced.   

The Holy Spirit teaches thus: There is no hell. Hell is only what the ego has made of the present. The belief in hell is what prevents you from understanding the present, because you are afraid of it. The Holy Spirit leads as steadily to Heaven as the ego drives to hell.           T-15.I.7:1-4.

... hell and oblivion are ideas that you made up, and you are bent on demonstrating their reality to establish yours. If their reality is questioned, you believe that yours is. For you believe that attack is your reality, and that your destruction is the final proof that you were right.   T-13,IV.2:3-5.

The ego teaches that Heaven is here and now because the future is hell. ... … But the belief in guilt must lead to the belief in hell, and always does. The only way in which the ego allows the fear of hell to be experienced is to bring hell here, but always as a foretaste of the future. For no one who considers himself as deserving of hell can believe that punishment will end in peace. T-15.I.5:1,/6:1.5-7.

To everyone Heaven is completion. ... The Holy Spirit knows that completion lies first in union, and then in the extension of union. To the ego completion lies in triumph, and in the extension of the "victory" even to the final triumph over God. ... And therefore union, which is a condition in which the ego cannot interfere, must be hell.    T-16.V.5:1,4,5,8.