Ye know how through infirmity of the flesh I preached the gospel unto you at the first.
On the contrary, you know that it was on account of a bodily ailment that [I remained and] preached the Gospel to you the first time.
but ye know that because of an infirmity of the flesh I preached the gospel unto you the first time:
You know that I first preached the gospel to you because of an illness.
But you know that, in the weakness of the flesh, I have preached the Gospel to you for a long time, and that your trials are in my flesh.