I read this devotion today on testimonies:

In his second letter to Timothy, Paul offers a message to believers of every generation when he writes, "God has not given us a spirit of timidity" (1:7). Paul's meaning is crystal clear: When sharing our testimonies, we, as Chrisitians, must be courageous, forthright and unashamed.

We live in a world that desperately needs the healing message of Christ Jesus. Every believer, each in his or her own way, bears responsibility for sharing the Good News of our Savior. It is important to remember that we bear testimony through both words and actions. Wise Christians follow the admonition of St. Francis of Assisi who advised, "Preach the gospel at all times and, if necessary, use words."

If you are a believer in Christ, you know how He has touched your heart and changed your life. Now is the time to share your testimony with others. So, as you make plans for the coming day, look for ways to preach the Gospel with your words and your deeds...but not necessarily in that order.

Be wise in the way you act toward outsiders; make the most of every opportunity.
Colossians 4:5 NIV