The apostle Paul writes in his letter to the Romans, “As for the one who is weak in faith, welcome him, but not to quarrel over opinions … One person esteems one day as better than another, while another esteems all days alike. Each one should be fully convinced in his own mind” (Rm. 14:1, 5). Now, this is not an invitation to quarrel over opinions, but it is an invitation to understand the Revelation of God more clearly by considering the opinions of others who love and cherish the Word of God.
Having taught through Romans, I know the potential response to this text, and I have heard responses outside of that context. Many times the initial response is not, “What does this text mean?” but it is, “Paul is not speaking of the Sabbath here.” Well, the text clearly says that some esteem one day better than another, and others esteem all days alike, yet the apostle’s response is not that one person is wrong and the other is not, but it is that each must be convinced in his own mind. Now if all in this text means every day, then that naturally would include the Sabbath. But if the argument is that Paul does not mean to include the Sabbath in this, then the burden of proof falls upon those who think that Christians are still obligated to keep the Sabbath.