DPS Seminar Alternate

Could you please go more into depth of this question?

"Examine how Mr. Keating is a martyr (Christ-like figure). Webster defines Martyr as "a person who voluntarily suffers death as the penalty of witnessing to and refusing to renounce a religion; a person who sacrifices something of great value and especially life itself for the sake of a principle; a victim." Consider each of the definitions and explain how Keating fits each one. Make sure to include his impact on the boys."