Two people can do the same thing, and one of them pleases the Lord but the other does not, because two people can do the same thing for different reasons. And there is no area of life where this is more true than in religious matters. The difference between legalism and liberty is a very fine line, and it’s very easy to cross that line without even knowing it, and, in my opinion, that’s the root of the problem we’re reading about today. The threat of persecution was constantly hanging over the heads of the church in Jerusalem, and it was their desire to avoid persecution that pressed them to appear as obedient to the Law of Moses as possible. If the church in that city was perceived in any way to be a force that turned Jews away from Judaism, they would be, and were, attacked. They would face physical violence, people would lose their jobs, unbelieving spouses would divorce them, families would disinherit them, property would be seized; they would become outcasts. In fact, even if they themselves kept the Law, if they were suspected of being in relationship with people who had stopped keeping the Law, or if they had supported someone, like Paul, who was preaching salvation by grace rather than Law-keeping, they would be attacked. So to protect themselves, they tried to observe the Law as fervently as possible, while still believing in Jesus. But as the years went by, it appears some hearts, maybe many hearts, became so fervent for the Law that the truth that salvation comes by faith in Christ alone had grown weak, or possibly disappeared altogether. Some may have drifted across a fine line.