Luke 3:10-14 (ESV)
And the crowds asked him, “What then shall we do?” And he answered them, “Whoever has two tunics is to share with him who has none, and whoever has food is to do likewise.” Tax collectors also came to be baptized and said to him, “Teacher, what shall we do?” And he said to them, “Collect no more than you are authorized to do.” Soldiers also asked him, “And we, what shall we do?” And he said to them, “Do not extort money from anyone by threats or by false accusation, and be content with your wages.”
The above statement is about the teaching of John the Baptist. It is the big idea of his teaching: Faith demands evidence. Just prior to the above passage Luke records this statement from John the Baptist.
Luke 3:8-9 (ESV)
Bear fruits in keeping with repentance. And do not begin to say to yourselves, ‘We have Abraham as our father.’ For I tell you, God is able from these stones to raise up children for Abraham. Even now the axe is laid to the root of the trees. Every tree therefore that does not bear good fruit is cut down and thrown into the fire.”
Bear fruit worthy of repentance. That is evidence. You don’t know if someone is a doctor until they start practicing medicine. You don’t know if somone is a truck driver until they start driving a truck. You don’t know if someone is a baker until they show up with bake goods. That is John’s point in the above passage. He wants them to be challenged that faith in God is a faith in action. There is a difference between head knowledge and life changing faith in Christ. We are to look different than those who do not have Christ. What is our evidence? The fruit of the Spirit in Galatians 5:22-23 is certainly that evidence. The actions stated by James in his epistle are evidence. As believers in Christ, we are to look different in our actions. We are to have evidence.