Human happiness and fulfillment are never found by pushing other people out of the way. They are found when we push ourselves out of the way. Pope John Paul II says as much in The Gospel of Life:
"He who had come "not to be served but to serve, and to give his life as a ransom for many" (Mk. 10:45), attains on the cross the heights of love: "Greater love has no man than this, that a man lay down his life for his friends" (Jn. 15:13). And he died for us while we were yet sinners (cf. Rom. 5:8).
"In this way Jesus proclaims that life finds its center, its meaning and its fulfillment when it is given up. At this point our meditation becomes praise and thanksgiving, and at the same time urges us to imitate Christ and follow in his footsteps" (cf. 1 Pt. 2:21).
"We too are called to give our lives for our brothers and sisters, and thus to realize in the fullness of truth the meaning and destiny of our existence" (Evangelium Vitae #51).
"This is my body." It is no accident that the same words are used for such different purposes. A spiritual conflict rages here. We win, in our own lives and in the world, by living these words in self-giving, life-giving love.