"In such an organization there should surely be no possibility of failure or trouble of any sort; and yet, because humanity is frail, and because not all members of this great Brotherhood are yet Supermen, failures do sometimes occur, although they are very rare. “Great ones fall back even from the threshold, unable to sustain the weight of their responsibility, unable to pass on,” as is said in Light on the Path, and only the attainment of Adeptship ensures perfect safety."