Let’s take liberating animals as an example. On the surface, it appears that we are benefiting other beings. But, in fact, the purpose of many people is that they themselves can avoid suffering or obtain benefit in this life. Can they achieve their goals this way? Yes, they can. However, to release animals from suffering with only selfish motives is not Mahayana practice because the actual beneficiary is no one else but oneself.

- Quote from The Right View, "The Three Differences"