Kabbalah su Salmi 34:9

King David, following the verse, “More to be desired are they than gold, even much fine gold; sweeter” that alludes to the three columns’ outpour of sweetness and preciousness, concludes with, “Moreover by them is your servant warned…” (Ibid.), that is, he was careful not to receive from the left column without the right. Rabbi Shimon concludes with, I testify that all my life I have been careful by them, the three columns, not to make the mistake of receiving from the left column on its own, except on one day. I was making crowns for the king in the cave of Meron, he did not make sure the left would be incorporated with the right, and I saw a flame of burning fire across the cave. That is, he saw the judgments of the left column without the right, which is burning fire, and I was shaken. Since that day I am consciously careful by them, to receive only from the three columns together, and I have not abandoned them all my life. Blessed is the portion of he who is warned by the king’s sweetmeats and properly tastes them. It is written of this, “O taste and see that Hashem is good” (Tehillim 34:9) and “Come, eat of my bread…” (Mishlei 9:5).