+I. An ambassador charged with a message of world-wide significance
and importance.+--"To make known the mystery of the gospel" (ver. 19).
+II. An ambassador, contrary to the law of nations, imprisoned
because of his message.+--"For which I am an ambassador in bonds"
(ver. 20).
+III. An ambassador irresistibly constrained to declare the message
for which he suffers.+--"That therein I may speak boldly as I ought
to speak" (ver. 20).
+IV. An ambassador imploring, not the sanction of civil authorities,
but the prayers of God's people that he may be emboldened to
discharge his high commission.+--"And for me, that utterance may be
given unto me, that I may open my mouth boldly" (ver. 19).