Why... ? Figure of speech Cycloides. The question repeated in Psalms 42:11 and Psalms 43:5. See the Structure, above.
And why... ? This second "why" is in the text of some codices, with Septuagint, Syriac, and Vulgate, as in Psalms 42:11 and Psalms 43:5.
help. Hebrew, plural salvations. Plural of majesty. great help, or great salvation.
His. Hebrew text reads "my", so that, where. go. am delivered.
countenance. Figure of speech Synecdoche (of Part), put for the whole person.