In evangelism and missions, we desire to see unbelievers taste the living water that Jesus offers (John 7:37-38). Yet, we often struggle with sharing the Gospel to people who do not sense a spiritual thirst. How can we whet their appetite for the Gospel? Jesus said: “You are the salt of the earth.” (Matthew 5:13) Salt has many purposes and properties, one of which is it makes us thirsty.
Salt is a hygroscopic substance, which means that it has the ability to attract and hold water from its surroundings. Because of the ionic charge of salt molecules (Na+Cl–), water molecules (H+2O–) easily gravitate to and bond with them. That’s why when we eat food with salt, our mouth becomes dry and thirsty. Because the salinity of our blood also increases from eating salt, then not just our mouth, but also our whole body craves water.
Jesus wants us to be like salt to help people develop a spiritual thirst for Him. That’s what Jesus did with the woman at the well (John 4). He whet her spiritual appetite through his conversation with her. In evangelism, it takes wisdom to know what to say, how to say it, and when to say it. Colossians 4:6 says: “Let your speech always be with grace, seasoned with salt, that you may know how you ought to answer each one.”
“You create thirst by sprinkling salt in your conversation, nonchalantly mentioning activities of a God-centered life (praying, viewing our kids as gifts from the Lord, being thankful about knowing where we would have gone had we been in that auto accident).” (Dave Brown, Fostering the Harvest, p. 26) May God use us as salt of the earth and our conversation with unbelievers to Spark A Longing Thirst for Christ.