The Book of Zohar, Introduction to the Book of Zohar, Article “The Night of the Bride,” section 138: This stems from the fact that man cannot perceive obvious evil from the Creator, as this would greatly undermine the creatures’ perception of the great and perfect Creator, for the Perfect one cannot create evil.
Therefore, to the extent that man feels bad and evil, and denies the Divine Providence, a veil immediately falls over him, and the sensation of the Creator’s existence disappears. This is the worst punishment in the world!
Hence, the sensation of good and evil in the Creator’s governance gives us a feeling of reward and punishment. This is because he who exerts efforts not to lose faith in the Creator‘s existence and governance, even if he tastes evil in His governance, is rewarded with finding strength to not lose faith in the governance and good purpose of the Creator’s “evil” influence. But if he had not yet merited the opportunity to exert efforts in believing that the Creator pursues a definite purpose by sending him unpleasant sensations, he is punished with remoteness from faith in the Creator and the sensation of His existence.
From here it is clear where reward and punishment and concealment and revelation come from, what the conditions are for a person to merit to this, and how he builds himself when confronting a bad feeling, a feeling of suffering.
It is impossible to cry and say, “Thank you very much.” To the degree that you are not accommodated to the Light, you feel concealment and so condemn the Creator. It follows that we have no choice; if we want to approach the Creator and bless Him, we must reach revelation.
From concealment, whether we want it or not, we are always compelled to curse Him. So only the Kabbalists, who attain the correct intention and transform darkness into Light, bless the higher power. And to that extent, they are in adherence with Him.
From the 1st part of the Daily Kabbalah Lesson 6/01/14, The Book of Zohar