I am afraid of all my sorrows - My fears return. I dread the continuance of my griefs, and cannot close my eye to them.
Thou wilt not hold me innocent - God will not remove my sorrows so as to furnish the evidence that I am innocent. My sufferings continue, and with them continue all the evidence on which my friends rely that I am a guilty man. In such a state of things, how can I be otherwise than sad? He was held to be guilty; he was suffering in such a way as to afford them the proof that he was so, and how could he be cheerful?

I am afraid of all my sorrows - Coverdale translates, after the Vulgate, Then am I afrayed of all my workes. Even were I to cease from complaining, I fear lest not one of my works, however well intentioned, would stand thy scrutiny, or meet with thy approbation.
Thou wilt not hold me innocent - Coverdale, after the Vulgate, For I knowe thou favourest not an evil doer; but this is not the sense of the original: Thou wilt not acquit me so as to take away my afflictions from me.

I am afraid of all my sorrows,.... That they would return upon him, and surround him, and overwhelm him, so that he should not be able to stand up against them, or under them; that they would increase and continue with him, and so he should never be released from them:
I know that thou wilt not hold me innocent: a sudden apostrophe to God as near him; the meaning is not, that he was confident that God would not justify him but condemn him in a spiritual sense; Job did not despair of his everlasting salvation, he knew and believed in his living Redeemer; he knew he should be acquitted and justified by his righteousness, and not be condemned with the world; but he was certain of this, as he thought that God would neither "cleanse" (k) him, as some render the word, from the worms his flesh was clad with, and from the filthy boils and ulcers he was covered with; nor clear him so as that he should appear to be innocent in the sight and judgment of his friends; but go on to treat him as if he was a guilty person, by continuing his afflictions on him, even unto death; he had no hope of being freed from them, and so of being cleared from the imputation of his friends, who judged of him by his outward circumstances.
(k) "quod non mundabis me", Montanus, Bolducius, Beza.

The apodosis to Job 9:27 --"If I say, &c." "I still am afraid of all my sorrows (returning), for I know that thou wilt (dost) (by removing my sufferings) not hold or declare me innocent. How then can I leave off my heaviness?"

Afraid - I find all such endeavours vain; for if my griefs be suspended for a time, yet my fears continue. Will not - I plainly perceive thou, O God, (to whom he makes a sudden address, as he doth also, Job 9:31,) wilt not clear my innocency by removing those afflictions which make them judge me guilty of some great crime. Words proceeding from despair and impatience.