Romans 14:5

Here is a second illustration. In this case the weaker brother does something and the stronger does not (Romans 14:6). This is the opposite of the situation that Paul pictured in the previous illustration. Again the reason the weaker brother observes the day is immaterial. The point is that he observes the day. When Paul wrote, Sabbath and Jewish feast day observances were matters of disagreement among Christians. The Jewish believers tended to observe these because they were part of their Jewish heritage, but the Gentile believers did not. Today the idea that by observing a certain day we please God more than we would if we did not is quite common. Some Christians believe that we should behave differently on Sunday, during Lent, or on some other "religious" day.