Self-sacrifice was the central theme. And if you read the Beatitudes from beginning to end and you begin to practice any of them or all of them, you will find it is nothing but self-sacrifice, self-denial, erasing the self, while cultivating the thought of gentleness, the thought of meekness, the thought of mildness. All this shows to us that his mission was to melt the hearts from grossness, from denseness, from hardness, to soften them, to make them refined, to have them enlightened, to liberate them. His coming and going was the example that a soul is brought here to do something and then is called back. His lesson was not the lesson of mystery, yet in his lesson there was every mystery, all mystery.