A Course in Miracles (ACIM) is a complete self-study spiritual thought system and three-volume curriculum (Text, Workbook for Students with 365 daily lessons, and Manual for Teachers). It teaches that the way to universal love, peace, and remembering oneness with God/Love is by undoing guilt through forgiving others. The "miracle" is a shift in perception from fear to love. It is presented as one version of a universal curriculum and is non-sectarian/non-denominational, despite using some Christian terminology. Core summary: “Nothing real can be threatened. Nothing unreal exists. Herein lies the peace of God.”