1)
How does Hashem abandon his Nefesh?
1.
Radak: He does not oversee its poverty.
2.
Malbim: He totally abandoned him. He does not oversee him at all; he is left to chance.
2)
How does Hashem hide His face?
1.
Radak: He does not turn to my prayer.
2.
Malbim: [Or, perhaps You still oversee me, but] You hide Your face so I do not see You. When one supervises over another and looks through the holes, he sees him, but the other does not see him.