1. To be wise witnesses, walk with wisdom.
“Walk” is a metaphor for steady a way of life that is headed in a particular direction. “Wisdom” in the Old Testament comes from a word for “skill.” It is used to describe the craftsmen who built the tabernacle (Exod. 36:1, 2). The Book of Proverbs often contrasts the wise man with the fool. The fool disregards God’s commandments about how to live, but the wise man skillfully orders his life according to God’s Word so that the results are like a finely crafted piece of furniture. To walk in wisdom produces a beautiful life.
When Paul says that we are to walk with wisdom toward outsiders, he means that we are to live in line with God’s Word so that those who are not Christians will see the beauty of our lives and relationships that reflect Jesus Christ. They ought to be able to see the fruit of the Spirit in us, which should draw them to the Savior.
A. WALKING WITH WISDOM BEGINS PRIVATELY THROUGH PRAYER.
“Devote yourselves to prayer, keeping alert in it with an attitude of thanksgiving” (4:2). Paul goes on (4:3) to ask for prayer for his own witness, but these verses also apply to our witness: A private walk with God in prayer is the foundation for verbal witness.
So, prayer is the first step in wise witnessing. Before you talk to a person about God, talk to God about that person. One of the most helpful books that I’ve read on evangelism is Concentric Circles of Concern [Broadman Press, 1981], by the late Oscar Thompson. He taught his students to make a list of the people in what he called “concentric circles of concern.” You are in the center of the circle—you’ve got to be right with God before you can be His witness. Moving outward, in the next circle is your immediate family, then your relatives, close friends, neighbors and business associates, acquaintances, and finally, “person X,” someone you don’t know.
You list each person’s needs and begin praying for them, that God would engineer the circumstances in their lives to draw them to Christ. Also, pray that He would use you as His channel of love and give you the opportunities and boldness to talk to the person about Christ. Meanwhile, look for needs that you can help meet in each of those circles. In the context of praying and lovingly meeting needs, God will give you opportunities for witness.
B. WALKING WITH WISDOM OCCURS OUTWARDLY BY MAKING THE MOST OF THE OPPORTUNITY.
Paul asked for prayer (4:3) that God would open the door for the word, but also that he would speak forth the mystery of Christ. In Ephesians 6:19, he asks for prayer “to make known with boldness the mystery of the gospel.” God has to open the door, but we need the boldness to speak about Christ when the door opens. If we bash in the door without God’s opening it, the message probably will not be well received. But if God opens the door and we don’t go through, the opportunity will be lost.
“Making the most of the opportunity” (4:5) is literally, “redeeming [or, buying up] the opportunity.” “Buying up” pictures a businessman or investor who knows an opportunity to make money when he sees one. He quickly moves in before the opportunity is gone. Or, picture a careful shopper who knows that all of the sale items will be gone within the first hour. So she gets to the store early to take advantage of the good deals. A wise witness is on the alert to buy up opportunities to share Christ with lost people.
Excerpt From https://bible.org/seriespage/lesson-4-wise-witnessing-colossians-42-6