The memories contained both the bell sound and the stimuli of food, since those realities were acquired at the same time. Through repetition, those memories would overlay earlier memories of a similar type. Stimuli then contacted the memories causing them to produce physiological responses. The memories could be contacted by a bell sound, because they had the bell sound within them. Humans are not psychologically conditioned in that manner as easily as animals, because they have more awareness, which controls memories more completely.
Awareness is highly corrective in minds in that it dissipates subconscious force.
Therefore, sin can overtake minds through subconscious forces. The Starting Point. Sin enters subconscious minds repeatedly creating cycles of regeneration. So we'll analyze the starting point of a cycle. In relating to other persons, the sinner finds that a problem occurs because of his inadequacies.