All the believers devoted themselves to the apostles’ teaching – Acts 2:42a (NLT)

No one lights a lamp and then puts it under a basket. Instead, a lamp is placed on a stand, where it gives light to everyone in the house. In the same way, let your good deeds shine out for all to see, so that everyone will praise your heavenly Father. – Matthew 5:15-16 (NLT)

The apostles’ teaching was the same as Jesus’ teaching, so the believers acted on what they believed, and the Holy Spirit changed their world. In the same way, when we today act on what we believe, our world will also be changed by the Holy Spirit. This may include leading people to the truth of Jesus’ love and forgiveness, or ministry to people’s physical needs, or encouragement of believers who are going through a period of trial. Whatever if may be for you today, let your light shine to the glory of your heavenly Father.