The motivation of an inferior disciple is the lowest of the three. Those who cultivate virtue with this kind of motivation do not think about liberation from samsara. They are only concerned with not being reborn into the hell, the ghost, or the animal realm but the realm of god or human; and as human, better be born as someone with good health, long life, high position and wealth. Their actions, albeit virtuous, would not bring them any closer to enlightenment. Hence, this type of motivation is relegated to the bottom level.
~ Depicted from THE RIGHT VIEW - The Three Supreme Methods—the ultimate methods of cultivating virtue and training the mind