242. What Is the Matter of Delighting the Poor on a Good Day, in the Work
The Zohar: "The Creator’s share is to delight the poor," etc.. In the Sulam (commentary), he interprets: since the Creator saw that the Lo Lishma (not for Her Name) does not bring him to Lishma (for Her Name), He rose up to destroy the world, meaning his abundance is stopped (The Book of Zohar, "Introduction of The Book of Zohar," item 6-7).
We could say that when one receives an illumination from Above, even while one has not been purified, if one takes this illumination in order to raise oneself from one’s lowliness and approach bestowal, it is considered that the Lo Lishma brings him Lishma. This means that he is advancing on the path of Torah.
And this is called "One who is happy on holidays." A holiday is a good day. And certainly, there is no greater good day than when some illumination shines for a person from Above, which brings one closer to the Creator.