For we know that the law is spiritual. But I am carnal, having been sold under sin.
For we know that the law is spiritual: but I am carnal, sold under sin.
We know that the Law is spiritual; but I am a creature of the flesh [carnal, unspiritual], having been sold into slavery under [the control of] sin.
We know that the Law is spiritual, but I’m made of flesh and blood, and I’m sold as a slave to sin.