Today's Gospel reading consists of just three verses from Luke 9: Jesus said to his disciples: "The Son of Man must suffer greatly and be rejected by the elders, the chief priests, and the scribes, and be killed and on the third day be raised." Then he said to all, "If anyone wishes to come after me, he must deny himself and take up his cross daily and follow me. For whoever wishes to save his life will lose it, but whoever loses his life for my sake will save it. What profit is there for one to gain the whole world yet lose or forfeit himself?"
The Lord here spoke definitively as God. He knew exactly what he was going to happen to him, laid down the precise conditions of discipleship for us to save ourselves, and asked the most poignant question that should make us realize that there is life after death. Listen to him.