Jesus is making his way to Jerusalem in order to give himself away, to sacrifice himself in love for the other—and in this, he will become a source of life to others.
Ronald Knox talked about the sign of the cross this way: the first two gestures form the letter “I” and the next two cross it out. That’s what the cross of Jesus meant and means. The path of discipleship is the path of self-sacrificing love—and that means the path of suffering.
(from Bishop Baron)