Jesus appeared to St. Catherine of Siena to assure her that a great flame does not diminish, even if it is used to light many candles. Such is the flame of the Holy Eucharist, because it does not weaken while enflaming the loyal faithful who come with their strong or weak faith. The stronger and weaker charity of each of the faithful is symbolic only by the flame’s dimension of the candles.
Regarding the Eucharist, Jesus confided the following words to St. Catherine of Siena: “You receive all the divine essence of the sweetest Sacrament in the whiteness in the bread. Just like the sun cannot be divided in the whiteness of the Holy Host.
Let us suppose that the Sacred Host could be divided: even if it would be possible to fragment the Holy Eucharist into thousands of tiny Particles, in each one of the tiny Particles there is the presence of Christ, the whole God and the whole Man. In the same manner that a mirror would shatter into thousands of pieces, the Sacred Host will not shatter or divide the image of God and Man that you see in the Host; the image of God and Man is in each fragmented part.
Contrary to fire, the image of the Host does not diminish in faith or divinity. Let us look at the following example: If you had one candle and the whole world would light its candle from that single candle, the light of the candle would not diminish and everybody would have a lighted candle. While it is true that those who participate in the candle lighting may have more or less flame, everyone would receive exactly the amount of fire to light their candle.