1 The expression “you asked” is added here to clarify the presence of the line to follow. Many commentators delete it as a gloss from Job 38:2. If it is retained, then Job has to be recalling God’s question before he answers it.
2 The word לָכֵן (lakhen) is simply “but,” as in Job 31:37.
3 Heb “and I do not understand.” The expression serves here in an adverbial capacity. It also could be subordinated as a complement: “I have declared [things that] I do not understand.”
4 The last clause is “and I do not know.” This is also subordinated to become a dependent clause.

In other versions

Then Job answered the Lord and said:

“I know that you can do all things,

and that no purpose of yours can be thwarted.

‘Who is this that hides counsel without knowledge?’

Therefore I have uttered what I did not understand,

things too wonderful for me, which I did not know.

Then Job replied to the Lord:

“I know that you can do all things;

no purpose of yours can be thwarted.

You asked, ‘Who is this that obscures my plans without knowledge?’

Surely I spoke of things I did not understand,

things too wonderful for me to know.

Then Job replied to the Lord:

I know that you can do anything

and no plan of yours can be thwarted.

You asked, “Who is this who conceals my counsel with ignorance?”

Surely I spoke about things I did not understand,

things too wondrous for me to know.

Then Job replied to the Lord:

“I know that you can do anything,

and no one can stop you.

You asked, ‘Who is this that questions my wisdom with such ignorance?’

It is I—and I was talking about things I knew nothing about,

things far too wonderful for me.

Then Job answered Yahweh and said,

“I know that you can do all things,

and any scheme from you will not be thwarted.

‘Who is this darkening counsel without knowledge?’

Therefore I uttered, but I did not understand;

things too wonderful for me, but I did not know.

Then Job answered the Lord, and said,

I know that thou canst do every thing,

And that no thought can be withholden from thee.

Who is he that hideth counsel

Without knowledge?

Therefore have I uttered that I understood not;

Things too wonderful for me, which I knew not.

Public Domain