This thought is in contrast with the hope of the enemies that he would soon die (v. 5).
Integrity.
Literally, “perfection,” in the sense of completeness. The verse suggests that the psalmist is recovering from his illness.
And as for me.
Literally, “And I.” The sentence is unfinished, or rather, completed in another grammatical form. The psalmist begins in the first person, and then abruptly shifts his attention to God, who upholds him.