Why did he say "Yamai Kalu"?
Rashi: My good days passed quickly.
Malbim: This refers to perfection that depends on time.
What is "Mini Areg"?
Rashi: They were kinds of woven garments, which are made quickly. So Chizkiyah said "Kipadti cha'Oreg Chayai."
Malbim: Warf and woof threads are woven quickly - one is a moment after the previous.
Why does it say "b'Efes Tikvah"?
Rashi: I have no more hope for good.
Malbim: So my days pass quickly - the coming day nullifies the past, and there is no hope to finish the work needed for perfection. You cannot say that the afflictions are for my good. If I slackened a little in Avodas Hashem, why should this cause a giant slackening for these many days [of my affliction]?!
