“Salt is good; but if the salt has lost its flavor, how shall it be seasoned? It is neither fit for the land nor for the dunghill, but men throw it out. He who has ears to hear, let him hear!” Luke 14:34:35

Salt is beneficial to everyone; whether for preservation, for healing, or for flavor, salt can be used to benefit all people.
However, in using the analogy of salt in a way that illustrates how we, as believers, present ourselves to others around us, we can determine if we are flavorful, healing, or preserving others with our words and attitudes.
Salt will lose its flavor after it has been used so everyone needs a fresh measure of salt that comes from the Holy Spirit as we keep our center at the cross.
Much the way a pan is seasoned in the oven, a saint will find that through the trials of life, joy is found in the fire, producing a seasoned saint.