1)
Why does it say that Hashem supervises from Shamayim?
1.
Radak: Even though He is high above them and hidden from them, he oversees them.
2)
What is "Maskil Doresh Es Elokim"?
1.
Radak: He is prudent to seek Hashem, and thinks that there is Elokim who judges.
2.
Malbim: Also they 1 did not know Hashem via seeking Him through intellect, to know His Emes and ways. It was only external, on their lips. Hashem knows the mind, whether they truly believe in Him and seek His ways.
1
I.e. Nebuchadnetzar and the other survivors of Sancheriv's camp, who believed in Hashem and honored Him. (PF)
