Jesus used parables to communicate principles of the Kingdom of God. He said each believer's life should have the same impact on his or her world as salt has on food. Salt gives food flavor and brings out the best while at the same time it serves as a preservative.
What allows a Christian to become salty? Fire is what makes the Christian salty. God knows that each believer needs a degree of testing by fire in order for the fragrance of Christ to be manifested. You and I cannot become salty without this deeper work of the Holy Spirit's fire in our lives. Fire purifies all that is not of Christ. It takes away all the impurities that prevent His nature from being revealed in us.
Friend, "In this you greatly rejoice, though now for a little while you may have had to suffer grief in all kinds of trials. These have come so that your faith --of greater worth than gold, which perishes even though refined by fire --may be proved genuine and may result in praise, glory and honor when Jesus Christ is revealed" (1 Peter. 1:6,7).
Are you a salty Christian? If not, pray a prayer that many less mature are unwilling to pray. Pray that God makes you a salty Christian. It will result in praise and glory at the throne of God.