Ambition vs Selfish Ambition - Mark 9:33-35

9:33 And he came to Capernaum: and being in the house he asked them, What was it that ye disputed among yourselves by the way?
9:34 But they held their peace: for by the way they had disputed among themselves, who should be the greatest.
9:35 And he sat down, and called the twelve, and saith unto them, If any man desire to be first, the same shall be last of all, and servant of all.