So we don’t work with only two categories: sacred and evil. There’s a third one: common. In this respect, the believer’s sphere of activity overlaps with that of his or her non-Christian neighbors. They share common blessings and common woes. Yet the holy nation that Christ is creating by his Word and Spirit is a remnant from all cultures, across all times and places. It is holy, not common, because it is claimed by God as the cherished object of his saving grace. Through his gospel, signified and sealed to us and to our children in baptism, the covenant community is that holy commonwealth that began with the announcement to our first parents after they had sinned.
Enjoying God’s creation is common. In its commonness, it is a remarkable testimony to God’s goodness, power, and other invisible attributes, as Paul tells us in Romans 1 and 2. However, hearing God’s gospel is holy and hearing and receiving it makes us holy, as Paul says in Romans 3 (and chapter 10). A great concert may witness to God’s glory in human creativity, but God delivers his saving Word in the covenant assembly. God is omnipresent and his creative power is evident through everything that he has made. However, the question for sinners is where God has promised to be present in grace and mercy.
God still separates one holy day out of six common ones. God still separates specific activities: preaching of the Word, public prayer, confession and declaration of pardon, administration of baptism and the Supper, singing the Word of Christ, and the fellowship of saints, from the common activities of work, friendships, and entertainment. So all of life is indeed blessed and upheld by God’s common grace, but there remains a distinction between the common and the holy; common grace and saving grace; that which is honorable, God-glorifying, and helpful to our neighbors and that which is redemptive.