How do we know being the salt of the earth is true?

The truth of being the salt of the earth is illuminated throughout Scripture. Jesus acknowledges that human righteousness is insufficient, stating 'none is good but one, that is God' (Mark 10:18). This underscores the need for the salt of the covenant—Christ Himself. In Romans 5:6-8, we see that Christ died for the ungodly, highlighting the depth of our need and His grace. It confirms that through His sacrifice, sinners are made into something valuable—salt that preserves and seasons the earth. Therefore, our identity as salt is grounded in Christ's presence and work in us.