The phrase "For thus..."

Grammar friends,

I am writing a poem and would like to use the phrase "for thus", but I'm not sure if it's appropriate, as I've never really seen the phrase other than as "For thus says the Lord." An example (not from my actual poem) of the desired usage is below.

Without a care for the consequences, I continue my physical labor.
For thus my body aches and groans, but I keep working.

What I want "for thus" to mean is "as a result of what I just indicated". I don't want to use just "thus", but I could use "for this" instead, though that sounds much less poetic. So is "for thus" an acceptable phrase in this instance? Or if not, do you consider it within the realm of poetic license? What do you think?

Thanks.