"Stand fast therefore in the liberty..."
Many Christians think this scripture means that we need to stand fast in our liberty of not being very religious. "Grace is enough" is their mantra. They smirk at the devout Christian.
"...that ye may be sincere and without offence..."
Many Christians think this scripture means that we should be sincere with one another and never allow ourselves to become offended with one another to drive a wedge between us.
"... why, as though living in the world, are ye subject to ordinances...?"
Many Christians think that this scripture means that we are "free in Christ" and "free from religion" and we do not follow ordinances.