Great post, let me continue along that line. I think the symbols of fire and salt help explain it too.
Suppose we are like olive trees and able to produce oil. We would still need a spark of the Divine Fire if we want to be "creatures of fire" which help shine the Light of God. Once we receive that fire, then it is up to us to act like trees in the dirt -- growing olives so we don't run out of oil. It is said in places that God is Light and in others that He is a fire. The same is said of angels. Which is it? It is both, I think.
The Light comes down, and the flames go up. "Did not our heart burn within us" is always a good place to be, since the human heart is still on fire, returning "something" to God in the form of praise or glory. The saint can also give Light to the world.
Indeed, Jesus left this world of men, but we who are left are to be the Light to others that Jesus was!
"And now I am no more in the world, but these are in the world, and I come to thee. Holy Father, keep through thine own name those whom thou hast given me, that they may be one, as we are" John 17:11
"Ye are the light of the world. A city that is set on an hill cannot be hid." Matt 5:14
And then compare also some uses of natural salt here:Now of course, physical salt cannot lose its savor, so let's not be naive and think Jesus was confused about that. But spiritual salt can lose it savor. The human heart is almost like a crystal of salt -- and ideally it is soft and malleable in a way physical salt isn't. It too has fire within it -- it is like a fiery stone. Such is the altar of God -- a stone from Heaven itself. If it has lost its savor, it is hard and brittle and dead. Just one Divine Spark can make it alive again if the Word is received properly.
1) Flavor
2) Preservative
3) Healing
Of course, there are saints who can speak the Living Word of God. When they preach the Gospel, it is with the intention of "Let there be Light." When they speak, it becomes so; and the heart ready to receive Light receives it, and the heart starts the process of being redeemed -- and bit by bit, the old heart (like brittle clay) is shattered and removed to be replaced by the "new heart." It is a miracle to me.
"Sow to yourselves in righteousness, reap in mercy; break up your fallow ground: for it is time to seek the LORD, till he come and rain righteousness upon you." Hosea 10:12
To be sure, everyone has received Light from Jesus himself -- everyone born into this world does. But the ways of this world can tempt children as they grow up to let that Light go out, and they are seduced into thinking they need to act like ravening beasts at times because it's a dog-eat-dog world. They don't want to become ravening beasts, but they fear they won't survive unless they do. The "Good News" as I see it is that God will protect us all if we don't fall prey to the fears of this world. There is no reason to betray self and God.
If our Light is not encouraged and increased, it will most certainly go out and be taken away leaving us in a most absolute darkness:
"For whosoever hath, to him shall be given, and he shall have more abundance: but whosoever hath not, from him shall be taken away even that he hath." Matt 13:12
The saint who preaches the Gospel is giving that sinner what he always wanted all along. He always wanted to behave lovingly. He never wanted to be something he felt ashamed of. Yes, it is safe to return to that state of innocence -- becoming like a little child spiritually, wanting to love and to be loved. Will such a person who lost his own light by being deceived fall for the same trick from the Dark Side again? Maybe a few, but I doubt many would. They know what they lost when they were deceived the first time. Why do that again?
Every sinner is hungry and thirsty and everyone will eat and drink as he can when he can... but what does it take to satisfy so that he never thirst again? Remember Jesus answer to the Samaritan woman at the well? Then again, too many look for the loaves and the fishes instead the "Bread of Life". Sometimes, people bearing the label "Christian" seem not to know the difference...