How do we know Christians are supposed to be light in the world?

In Matthew 5:14, Jesus states, 'Ye are the light of the world.' This designation carries the responsibility of shining light into the darkness of sin and despair. Just as a city on a hill is visible from afar, so too should the lives of believers be distinct and evident to others. This light represents the truth, hope, and salvation found in Jesus Christ. In a world that loves darkness, believers are to reflect His light through their words and actions, living in a manner that brings glory to God. The demonstration of good works should draw attention to God's goodness and lead others to seek Him. Thus, it is vital for Christians to actively embody and express the light of Christ to fulfill their divine calling.