Berean Study Bible
When I tried to understand all this, it was troublesome in my sight

King James Bible
When I thought to know this, it was too painful for me;

American Standard Version
When I thought how I might know this, It was too painful for me;

Darby Bible Translation
When I thought to be able to know this, it was a grievous task in mine eyes;

Douay-Rheims Bible
I studied that I might know this thing, it is a labour in my sight:

English Revised Version
When I thought how I might know this, it was too painful for me;

Young's Literal Translation
And I think to know this, Perverseness it is in mine eyes,