Ambassador's Creed

Stand to Reason has a very helpful description of an ambassador for Christ:

An ambassador is…
§ Ready. An Ambassador is alert for chances to represent Christ and will not back away from a challenge or an opportunity.
§ Patient. An Ambassador won’t quarrel, but will listen in order to understand, then with gentleness seek to respectfully engage those who disagree.
§ Reasonable. An Ambassador has informed convictions (not just feelings), gives reasons, asks questions, aggressively seeks answers, and will not be stumped by the same challenge twice.
§ Tactical. An Ambassador adapts to each unique person and situation, maneuvering with wisdom to challenge bad thinking, presenting the truth in an understandable and compelling way.
§ Clear. An Ambassador is careful with language, and will not rely on Christian lingo nor gain unfair advantage by resorting to empty rhetoric.
§ Fair. An Ambassador is sympathetic and understanding towards others, and will acknowledge the merits of contrary views.
§ Honest. An Ambassador is careful with the facts and will not misrepresent another’s view, overstate his own case, or understate the demands of the Gospel.
§ Humble. An Ambassador is provisional in his claims, knowing that his understanding of truth is fallible, and will not press a point beyond what his evidence allows.
§ Attractive. An Ambassador will act with grace, kindness, and good manners and will not dishonor Christ in his conduct.
§ Dependent. An Ambassador knows that effectiveness requires joining his best efforts with God’s power.

"We are therefore Christ's ambassadors, as though God were making his appeal through us. We implore you on Christ's behalf: Be reconciled to God." 2 Cor 5:20