I am afflicted very much - The form of the affliction is not mentioned. There are frequent allusions in the psalm to the fact that the author was and had been afflicted - as, in fact, must be the case in the life of every good man. Compare Psalms 119:71, Psalms 119:75. If David was the author of the psalm, we know that there were numerous occasions in his life when this language would be appropriate. As designed for the people of God at all times, it was important that there should be these allusions to affliction.
Quicken me ... - Make me live; give me life and vigor, that I may bear up under my trials. See the notes at Psalms 119:25.