Be wholehearted with the Lord, your God. (18:3) To understand what Hashem demands of us in being wholehearted: Rashi explains: “Conduct yourself with Him with simplicity, and depend on Him.” Rashi quotes from the Sifri: Be wholehearted with the Lord, your God: Conduct yourself with Him with simplicity and depend on Him, and do not inquire of the future; rather, accept whatever happens to you with [simplicity and then, you will be with Him and to His portion.
The Ach Pri Tevuah of the Liska Rebbe refers us to the Gemarra Avodah Zara 6a, which says that Noach was ohn,' uhfrsc wholehearted in his ways and the word “wholehearted” referring to Noach is explained by Rashi as jur kpau uhbg' being very humble. As the Novi Yeshaya says (57:15) I dwell ... with the crushed and humble in spirit. Therefore, Hashem says: “Be wholehearted with me, and be humble.” Chazal praise the Midah of being humble as the basis for to having Hashem rest His Divine Presence upon us. Therefore, Noach merited to having Hashem reveal him about His plans with the flood and to build a Arc to save Noach and his family.
The Divrei Yisrael of Modzitz describes the essence of temimus: A child doesn’t worry about the future. He trusts in his parents’ abilities and compassion. This is how one should trust in Hashem. As Dovid Hamelech says (Tehillim 131:3): “I silenced my soul like a child who nurses from his mother.” A child looks up to his parents and realizes that only they can protect him. The same is with regard to our behavior towards Hashem. When we realize that only He gives us everything, He will give us all we need. Dovid Hamelech says (Tehillim 55:23): Cast your burden upon the Lord, and He will bear your burden; [He will supply your needs.] He will never allow a righteous man to falter. A humble person is righteous, and Hashem will give him all that he needs. This is the connection to the Psukim: There shall not be found among you anyone who passes his son or daughter through fire, a soothsayer, a diviner of [auspicious] times, one who interprets omens, or a sorcerer, or a charmer, a pithom sorcerer, a yido'a sorcerer, or a necromancer. The reason one would do any of the above, is because of being insecure with himself. But when one is wholehearted with Hashem and is Humble, he merits having Hashem rest His Divine Presence upon him. This will bring him security and guarded by Hashem and nothing bad can happen.
The Zohar HaKodosh (Zohar Chodosh) on the Posuk, Tehilim (97:11) “Light is sown for the righteous...” alludes to that hidden light being used by future qualified tzadikim. In summary: The Creator hid away the intense, spiritual light present during the Six Days of Creation for the benefit of future tzadikim, since it was too intense for ordinary human beings to tolerate or use properly. The Chozeh of Lublin was known to have powers of vision, This was his spiritual high level of harnessing the “ohr haganuz” -- that other-worldly light -- to see far-off visions, unattainable by lesser beings. The Chozeh would during the half hour of gazing into the Chanukah lamps, would foretell what was going to happen the next year. The year that he passed away on Tisha Bav, he foretold only up to the month of Av. According to the Meor Einayim of Tchernobil, who heard from the Baal Shem Tov: Any Yid who learns Torah with Yiras Shamayim, can merit to see the Ohr Haganuz. Even an ordinary Yid, with the proper preparation, can merit to bask in a small glimmer, a tiny spark of that hidden primeval light, which can then enlighten his path in avodas Hashem.
This can be interpreted in the Posuk And it shall be with him, and he shall read it all the days of his life,17:19. The Torah is speaking of the Torah that had to be with the King at all times. However, we can say an insight that the Torah is speaking to every Yid And it shall be with “him” - Hashem, he is wholehearted in his ways, then and he shall literally read in the Torah all the happenings of the days of his life Then the Posuk concludes the explanation. so that he may learn to fear the Lord, his God, to keep all the words of this Torah and these statutes, to perform them. This is learning the Torah wholehearted. (Yehuda Z. Klitnick)
