In his explanation of the Ornament of Clear Realization , Patrul Rinpoche raised a crucial point. He said, “The goal of the bodhisattva is not to attain Buddhahood.” If that was not the goal, would the practitioners of Mahayana have any goal at all?

What he really meant is that if the aspiration to attain Buddhahood was simply due to one’s admiration for the Buddha’s greatness, his pure innocence and fulfillment of all virtues, yet no concerns for liberation of other sentient beings, it would not be in accordance with the doctrine of Mahayana. In other words, if liberation of others is out of the consideration, no matter how hard one works to keep the vow of attaining Buddhahood, those efforts will not be counted as Mahayana practice.

- Quote from The Right View, "The Three Supreme Methods"