The entire pasuk states, “So said HaShem, ‘If not for My Covenant [of] day and night, I would not have put the laws of Heaven and Earth [into effect].” (Yirmiyahu: 33; 25)
 This pasuk states, “HaShem has [laid the] foundation of The Earth with wisdom, He has established the Heaven with understanding.” (Mishlei: 3; 19)
RaSh”I explains that HaShem laid the foundations of The Earth through use of The Torah, which is wisdom, and has established the Heaven with understanding, which also refers to The Torah. Metzudas David points out that it was the wisdom of The Torah that was used in laying the foundation of The Earth and it was the understanding of The Torah which HaShem used to establish The Heaven.
 This part of the teaching from The “Zohar” that the Chofetz Chaim doesn’t quote, brings another pasuk from sefer “Mishlei”, which states, “And I shall be for him as a wet-nurse, and I shall take delight [in it] every day, rejoicing before him every day.” (Mishlei: 8; 30) (Translation based on Metzudas David)
 This teaching from The “Zohar” also relates to the pasuk from sefer “Tehillim”, which states, “With The Word of HaShem, The Heaven was made, and with The Breath of His Mouth, all of His Legions.” (Tehillim: 33; 6) The Word of HaShem and “The Breath of His Mouth” both refer to The Torah, as we learned in The “Zohar”.
 This section of The “Zohar” continues by noting “and all the more so [is this true] of the breath of the children [who learn Torah] in the house of their rabbi.” From here we see that the Torah study of children which is more pure than The Torah studied by adults, as children as considered to be free of sin. Therefore, as adults have the power to create worlds and maintain their existence through their involvement in Torah study, this is all the more-so true of The Torah studied by children.
 The entire pasuk states, “And I shall place My Words in your mouth, and I shall cover you in The Shadow of My Hand, to plant The Heaven and to lay the foundation of The Earth, and to say to Tzion, ‘You are My Nation’.” (Yishayahu: 51; 16)
 The Chofetz Chaim didn’t quote the pasuk from The “Zohar”, which is reiterated to demonstrate that “And I shall place My Words in your mouth, and I shall cover you in The Shadow of My Hand…” (Yishayahu: 51; 16) is the source which shows that one who involves himself in Torah study has HaShem’s Shechinah cover over him.