Definition and Context:
Living counter-culturally refers to adopting beliefs, values, and behaviors that stand in contrast to the prevailing norms and practices of society. For Christians, this often means aligning one's life with biblical principles, even when they conflict with cultural trends. This concept is rooted in the call to be "in the world but not of the world" (John 17:14-16), emphasizing a distinct identity and mission.

Biblical Foundation:
The Bible provides numerous examples and teachings that encourage believers to live counter-culturally. Romans 12:2 exhorts, "Do not be conformed to this world, but be transformed by the renewing of your mind." This transformation involves a conscious rejection of worldly values in favor of God's will.

Old Testament Examples:
1. Daniel and His Friends: Daniel and his companions exemplify counter-cultural living by refusing to defile themselves with the king's food and drink (Daniel 1:8). Their commitment to God's laws over the king's decrees demonstrates a steadfast adherence to divine principles.

2. The Prophets: Prophets like Jeremiah and Isaiah often stood against the prevailing cultural and religious practices of their time, calling the people back to faithfulness to God. Jeremiah 6:16 urges, "Stand at the crossroads and look; ask for the ancient paths, where the good way is, and walk in it."

New Testament Teachings:
1. Sermon on the Mount: Jesus' teachings in Matthew 5-7 present a radical departure from societal norms, advocating for love of enemies, humility, and purity of heart. Matthew 5:14 declares, "You are the light of the world. A city on a hill cannot be hidden."

2. The Early Church: The early Christians lived counter-culturally by forming a community that shared possessions, cared for the needy, and worshiped Christ as Lord in a pagan society (Acts 2:44-47).

Principles for Counter-Cultural Living:
1. Holiness: 1 Peter 1:15-16 calls believers to be holy in all conduct, reflecting God's holiness. This involves setting apart one's life for God's purposes, often in contrast to societal norms.

2. Love and Service: Counter-cultural living is marked by love and service, even to those who oppose or persecute. Romans 12:20-21 instructs, "If your enemy is hungry, feed him; if he is thirsty, give him a drink... Do not be overcome by evil, but overcome evil with good."

3. Truth and Integrity: Ephesians 4:25 emphasizes speaking truthfully and living with integrity, rejecting deceit and falsehood prevalent in the world.

Challenges and Encouragement:
Living counter-culturally can lead to misunderstanding, opposition, and persecution. Jesus warned His followers of this reality in John 15:18-19 : "If the world hates you, understand that it hated Me first... because you are not of the world, but I have chosen you out of the world." Despite these challenges, believers are encouraged to persevere, knowing that their reward is great in heaven (Matthew 5:11-12).

Conclusion:
The call to live counter-culturally is a call to faithfulness and distinctiveness in a world that often opposes God's ways. By adhering to biblical principles, Christians bear witness to the transformative power of the Gospel and the hope of God's kingdom.