What does the Bible say about being salt and light?

In Matthew 5:13-16, Jesus declares that believers are the 'salt of the earth' and the 'light of the world.' This signifies that Christians are to play a vital role in preserving goodness and truth in a world filled with corruption and sin. Salt, traditionally used for preservation, symbolizes the believer's role in restraining decay, while light represents the revelation of God's truth amidst spiritual darkness. Believers are called to live in such a way that their lives attract others to the gospel, reflecting Christ's light through their actions and character.