Why is understanding the Pharisees and Sadducees important for Christians?

The Pharisees and Sadducees represent the two predominant religious groups in first-century Judaism. The Pharisees were known for their strict adherence to the law and their belief in resurrection and angels, while the Sadducees denied the resurrection and upheld a liberal interpretation of scriptures. By recognizing the failings of these groups, Christians can examine their own hearts for signs of self-righteousness, legalism, or the belief in salvation through works rather than grace. The warning against the attitudes of the Pharisees and Sadducees serves as a caution that the true Gospel opposes any notion of human merit and emphasizes reliance on Christ alone for salvation.