1)
How is he 'to Hashem'?
1.
Radak: He is His servant. I have no affair other than Your Torah; I investigate Your Pikudim all my days.
2)
Does "Ki" give the reason?
1.
Radak: Yes. Because I constantly investigate Your Pikudim, You should save me, like one saves his slave.
2.
Malbim: Yes. I almost was wiped out, because I guard Your Pikudim. Their hatred of me is due to the honor of Your name and Your Pikudim!
