“He who enjoys this world without a blessing, it was said about him, ‘He who robs his father and his mother and says, ‘There is no crime,’ is a friend of a man who destroys’” (Berachot 35b). In The Zohar, “Who is a man who destroys? It is he who blemishes the moon,” since he connects to the Sitra Achra that prevented blessings from the world” (Pekudei 182).
The meaning of blessing is bestowal, regarded as “light of Hassadim.” If the lower one does not engage in the quality of bestowal, he makes it impossible for abundance to pour down from above. Thus, he denies the world of blessings.
It can be interpreted that “world” is called Malchut, meaning he denies the abundance from the Shechina [Divinity], meaning that the abundance is extended through faith.