The primary discipline of the mahayana is helping others, putting others before ourselves. The training of the mahayana practitioner is to exchange himself for others. As a well-known mahayana slogan puts it: "Gain and victory to others; loss and defeat to oneself." However, it should be clear that this attitude is not based on self-denial or martyrdom, but rather springs from the development of genuine warmth and compassion. Thus, the mahayana is expansive and embracing.
Thank you Teo for this long and enlightening post.