Ever make a really great decision about something in your life? Let us assume you said, "Yes". Did you then tell a few people about your experience in detail? Voila! You are now an ambassador.
In Paul's second letter to the church in Corinth, Paul explained the meaning of ambassador in relation to Christ.
For Christ’s love compels us, because we are convinced that one died for all,...
And he died for all, that those who live should no longer live for themselves but for him who died for them and was raised again.
And he has committed to us the message of reconciliation. 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 Corinthians 5:14-15, 19-20)
There is a wonderful song that goes - "Oh, how I love, Jesus. Oh, how I love Jesus. Oh, how I love, Jesus. Because He first loved me." This song trumpets the word "convinced" in the passage above - "For Christ’s love compels us, because we are convinced that one died for all,".
If you are in that group that is convinced by the compelling love of Christ Jesus, then you should no longer live for yourself, but for Him who died for you AND you should be an excellent steward of the message of reconciliation He has committed to us.
As God's children and especially His Ambassadors, God says His grace is sufficient for us, His power is made perfect in our weakness and His abundance is a promised benefit of His Salvation Package (2 Cor. 12:9; 2 Cor. 9:8; John 10:10).
With The Lord and His Kingdom, representing Christ "as though God were making his appeal through us" is an awesome responsibility. However, we have help through the Holy Spirit. So, don't stress over appearance or saying the right words at the right time for every situation. The Lord has brought you this far, He will orchestrate and anoint your divine encounters. Scripture helps our efforts out by instructing - "Always be prepared to give an answer to everyone who asks you to give the reason for the hope that you have. But do this with gentleness and respect," (1 Peter 3:15). So, live your life as a light to others, showing, Biblically, what a "light-filled" life looks like and illuminating the way for others to be Convinced Of Ambassadorship.