The fact is that aspiring to save all the lives in the world is an impossible mission even for the Buddha who can only help those whose karma has ripened and are thus receptive to his teachings. To those with yet ripened karma, the Buddha is equally helpless. The same reasoning also applies to liberating living beings. For someone as wealthy as Indra, the ruler of gods, not even he could have bought and liberated all the beings there were. As there are an infinite number of sentient beings, it could be even beyond the Buddha’s reach sometimes to deliver beings from samsara, let alone what our limited ability can achieve. All we can do is to help other beings the best we know how.

~Depicted from THE RIGHT VIEW - Liberating Living Beings