1)
Why does it say "Ki Chilatzta Nafshi mi'Maves"?
1.
Radak: Like You promised my Nefesh, so You did. I was close to death from the affliction [and You saved me].
2.
Malbim: You saved me from death, even though it was decreed on me.
2)
What is the meaning of "Es Eini Min Dim'ah"?
1.
Radak: You saved my eye from tears; I did not cry like I cried in my affliction.
2.
Malbim: You saved my eye from what I cried in front of You, like "va'Yevk Chizkiyah Bechi Gadol" (Melachim II, 20:3).
3)
What is "Es Ragli mi'Dechi"?
1.
Radak: You saved my feet from being cast off and exiled.
2.
Malbim: You saved that my feet will not be pushed off from the good and straight path.