The church began on the day of Pentecost (Acts 2) with the outpouring of the Spirit and the preaching of the gospel. The miraculous manifestations of the Spirit were to confirm the new revelation given by the Apostles (Hebrews 2:4). Although I do not think we should expect to see in our lifetime the things that were marks of the Apostles (2 Corinthians 12:12), I believe we are to be a spiritual church.
We are to be a spiritual church because our faith is based on the inspired Word of God (2 Timothy 3:16-17). Jesus told the Apostles: “I have many more things to say to you, but you cannot bear them now. But when He, the Spirit of truth, comes, He will guide you into al the truth; for He will not speak on His own initiative, but whatever He hears, He will speak; and He will disclose to you what is to come” (John 16:12-13, NASB). Scripture comes to us because of “men moved by the Holy Spirit spoke from God” (2 Peter 1:21).
We are to be a spiritual church because Christians have received the indwelling Spirit when they were baptized (Acts 2:38-39, Acts 5:32). The Spirit is a motive for holiness (1 Corinthians 6:19). The Spirit aids us in our struggle with sin (Romans 8:13). The Spirit is said to produce in us the fruit of the Spirit: love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, and self-control (Galatians 5:22-23).
We are to be a spiritual church because of prayer. One of the hallmarks of the church in Acts is prayer (Acts 2:42, 3:1, 4:24, 6:4, 12:12, 13:3, 14:23, 20:36, 21:5).
What we should be and could be is not always what we are. Paul in addressing the problems in Corinth says that he ought to be speaking to spiritual people, but in reality, they were carnal (fleshly), still babes in Christ (1 Corinthians 3:1). May the word of Christ dwell in us richly, may we not grieve the Spirit but mature producing the fruit of the Spirit, and may we learn to pray without ceasing. These are the things that characterize a spiritual church.