King James Bible
Though I were perfect, yet would I not know my soul: I would despise my life.

New King James Version
“I am blameless, yet I do not know myself; I despise my life.

American Standard Version
I am perfect; I regard not myself; I despise my life.

Berean Study Bible
Though I am blameless, I have no concern for myself; I despise my own life.

Douay-Rheims Bible
Although I should be simple, even this my soul shall be ignorant of, and I shall be weary of my life.

English Revised Version
I am perfect; I regard not myself; I despise my life.

World English Bible
I am blameless. I don't respect myself. I despise my life.

Young's Literal Translation
Perfect I am! -- I know not my soul, I despise my life.

Job 9:21 Additional Translations ...