The Bible says that we are ambassadors for Jesus Christ. An ambassador is an alien in the country He is sent to on a mission. Likewise our citizenship is in heaven, and we are aliens on earth (Philippians 3:20), but what is our mission?

Elizabeth Cheney’s poem,  “There is a Man on the cross” best describes our calling and commission.

Whenever there is silence around me
by day or by night
I am startled by a cry.
It came down from the cross —
The first time I heard it.
I went out and searched —
and found a Man in the throes of crucifixion,
and I said, “I will take You down,”
and I tried to take the nails out of His feet.
But He said, “Let them be,
for I cannot be taken down
until every man, every woman and every child
come together to take Me down.”
And I said: “But I cannot hear you cry.
What can I do?”
And he said, “Go about the world —
Tell everyone that you meet —
There is a Man on the cross.“

2 Corinthians 5:20 (KJV)
20 Now then we are ambassadors for Christ, as though God did beseech you by us: we pray you in Christ’s stead, be ye reconciled to God.

1 Corinthians 1:17-18 (KJV)
17 For Christ sent me not to baptize, but to preach the gospel: not with wisdom of words, lest the cross of Christ should be made of none effect.
18 For the preaching of the cross is to them that perish foolishness; but unto us which are saved it is the power of God.