This is what is known as the Great Commission. In the original language, these words are a command. That is why we call this the Great Commission and not the Great Suggestion. And I believe that to fail to do this actually could be a sin.
Jesus’ followers were gathered together for Pentecost, and the Holy Spirit “filled the whole house where they were sitting” (Acts 2:2). “All of them were filled with the Holy Spirit and began to speak in other tongues as the Spirit enabled them” (Acts 2:4).
In some Christian traditions, the church elder is an appointed person who usually serves a local church or churches and who has been ordained to a ministry of word, sacrament, and order, fulfilling the preaching and pastoral duties.