The Lord's Building
Eph 2:21-22 In him the whole building is joined together and rises to become a holy temple in the Lord. And in him you too are being built together to become a dwelling in which God lives by his Spirit.
The Christian community is likened to a building "For we are God's fellow workers; you are God's field, God's building." 1Cor 3:9 And in particular a temple to which people are drawn in their approach to God and in which is prayerful communication with God. Unfortunately post-Biblical Institutional Christianity has characteristically associated "church" with a physical building. Thus Christians today speak of going to a church rather than thinking of themselves as the church. It is neither the buildings nor the institutions called "churches" which compose God's temple, but rather the community of those who have put their faith in Christ regardless of whether they go to a particular building on a particular day of the week.
God lives in the believers through the Spirit, who imparts spiritual gifts for the mutual edification of the body of Christ. Everyone is important, not just pastors.
Application of Eph 2:11-22
Even today there are divisions based on racial and ethnic backgrounds within the Christian community. There are churches that are almost exclusively Black, White, Chinese or Hispanic and whereas there is some legitimacy in focusing a ministry on a particular peoples group, these can often become not much more than ethnic social clubs. But fortunately the Jew/Gentile conflict had been resolved in the New Testament, so also this resolution has led to a sense of family unity within the Christian community throughout the world. Thus we reap the benefit of the early Christians going to the cross over this matter.