Definition and Context:
In biblical terms, "common use" refers to items, practices, or concepts that are ordinary, everyday, or secular, as opposed to those that are sacred or set apart for divine purposes. The distinction between the common and the sacred is a recurring theme in Scripture, emphasizing the holiness of God and the call for His people to be set apart.

Old Testament References:
The concept of common versus sacred is evident in the Old Testament, particularly in the laws and rituals given to the Israelites. Leviticus 10:10 instructs the priests, "You must distinguish between the holy and the common, between the unclean and the clean." This distinction was crucial for maintaining the purity and holiness required by God.

The utensils and items used in the tabernacle and later the temple were consecrated for sacred use. For example, in Exodus 30:29 , God commands, "You are to consecrate them so that they will be most holy. Whatever touches them will be holy." This consecration set these items apart from common use, underscoring their role in worship and service to God.

New Testament References:
In the New Testament, the distinction between common and sacred continues, though with a shift in focus due to the new covenant established through Jesus Christ. Acts 10:14-15 recounts Peter's vision, where he is told, "Do not call anything impure that God has made clean." This vision signifies the breaking down of barriers between Jews and Gentiles and the expansion of God's covenant to all people, yet it also highlights the transformation of what was once considered common.

Paul addresses the concept of common use in 1 Corinthians 10:31 , stating, "So whether you eat or drink or whatever you do, do it all to the glory of God." Here, the apostle emphasizes that even ordinary, everyday actions can be sanctified and offered to God, blurring the lines between common and sacred in the life of a believer.

Theological Implications:
The distinction between common and sacred serves as a reminder of God's holiness and the call for His people to live lives that reflect His character. While certain items and practices were designated for sacred use under the Old Covenant, the New Covenant invites believers to view all aspects of life as opportunities for worship and service to God.

The transformation of the common into the sacred is a theme that resonates with the Christian doctrine of sanctification, where believers are called to be holy as God is holy (1 Peter 1:16). This process involves setting apart one's life for God's purposes, allowing His presence to permeate every aspect of existence.

Practical Application:
For Christians today, understanding the concept of common use involves recognizing the potential for every part of life to be an act of worship. Whether in work, relationships, or leisure, believers are encouraged to seek God's glory and purpose, transforming the ordinary into the extraordinary through faith and obedience.