“I have said that this body of his is a sun. Therefore you could not be given the body without being given the blood as well nor either the body or the blood without the soul of this Word; nor the soul or body without the divinity of me, God eternal. For the one cannot be separated from the other - just as the divine nature can nevermore be separated from the human nature, not by death or by any other being that you receive in that most gracious sacrament under that whiteness of bread.
And just as the sun cannot be divided, so neither can my wholeness as God and as human in this white host. Even if the host is divided, even if you could break it into thousands and thousands of tiny bits, in each one I would be there, wholly God and wholly human. It is just as when a mirror is broken, and yet the image one sees reflected in it remains unbroken. So when this host is divided, I am not divided but remain completely in each piece, wholly God, wholly human.
Nor is the sacrament itself diminished by being divided, any more than fire, to take an example. If you had a burning lamp and all the world came to you for light, the light of your lamp would not be diminished by the sharing, yet each person who shared it would have the whole light. True, each one's light would be more or less intense depending on what sort of material each brought to receive the fire. I give you this example so that you may better understand me. Imagine that many people brought candles, and one person's candle weighed one ounce, another's more than that, and they all came to your lamp to light their candles. Each candle, the smallest as well as the largest, would have the whole light with all its heat and color and brightness. Still, you would think that the person who carried the one-ounce candle would have less than the one whose candle weighed a pound. Well, this is how it goes with those who receive this sacrament. Each one of you brings your own candle, that is, the holy desire with which you receive and eat this sacrament. Your candle by itself is unlit, and it is lighted when you receive this sacrament. I say it is unlit because by yourselves you are nothing at all. It is I who have given you the candle with which you can receive this light and nourish it within you. And your candle is love, because it is for love that I created you, so without love you cannot have life.
It is with this love that you come to receive my gracious light, the light I have given you as food, to be administered to you by my ministers. But even though all of you receive the light, each of you receives it in proportion to the love and burning desire you bring with you. Each of you carries the light whole and undivided, for it cannot be divided by any imperfection in you who receive it or in those who administer it. You share as much of the light (that is, the grace you receive in this sacrament) as your holy desire disposes you to receive.
(From The Dialogue -words of God the Father to St. Catherine of