Conventional: A spiritual element in humans that is individual and is from God, yet which can fall from grace, become corrupted and ensnared in what is not of God, and finally either become lost or become purified, perfected, and return to God. ACIM: The term "soul" is found only rarely in the Course, apparently because it tends to spark controversy over questions of its precise theological meaning and validity (see the discussion of controversy around terms in (C-In.2), and perhaps because of its loaded connotations which have no counterpart in the Course's system. The Course has this to say: "The term 'soul' is not used except in direct biblical quotations because of its highly controversial nature. It would, however, be an equivalent of 'spirit,' with the understanding that, being of God, it is eternal and was never born" (C-1.3:2-3). See spirit.