Sentence:  ... this soul does not exist <WSD>"ab initio</WSD>", as orthodox Christianity teaches; it has to be brought into existence by a process of guided self-observation. However, this is rarely achieved, owing to man's unique ability to be distracted from spiritual matters by everyday trivia. 
Meaning of the word marked with <WSD> tags:  Calculated from first principles, i.e. from basic laws without any further additional assumptions.