"Go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit." — Matthew 28:19
We can't leave the topic of faith alone without emphasizing that because we are saved graciously by faith in Jesus, we are also commissioned to share our faith with others.
We have received good news, and this is to be shared with the world. Keeping faith to ourselves would be like keeping everyone's mail and never delivering it through the postal service. Faith, like the mail, needs to be passed along. Unshared faith isn't pointless, but it's not vibrant faith either.
Sharing our faith should be a response of joy, but it's also a charge from Jesus. His commands aren't optional.
Does that mean we need to pass out tracts at the grocery store? Maybe. Does that mean we need to preach on street corners? Maybe. Perhaps those ways of sharing faith aren't for you. Then try something closer to home. Did you know that most people who become Christians do so through the witness of a personal acquaintance? Maybe the Holy Spirit even used a family member or a friend to speak to your heart.
Surely there's someone in your life who needs to hear about Jesus. Does the thought of sharing your faith make you tremble? If so, remember that Jesus has promised to be with us in sharing our faith — even "to the very end of the age."