The concept of testing all teachings is rooted in the biblical exhortation to discern truth from falsehood, ensuring that one's faith and understanding align with the teachings of Scripture. This principle is primarily derived from the New Testament, where believers are encouraged to exercise discernment and wisdom in evaluating doctrines and teachings.

Biblical Foundation

1. 1 Thessalonians 5:21 · "but test all things. Hold fast to what is good."
This verse is a direct command to the Thessalonian church, urging believers to examine everything carefully. The context suggests a need for vigilance in spiritual matters, ensuring that only what is good and true is retained.

2. 1 John 4:1 · "Beloved, do not believe every spirit, but test the spirits to see whether they are from God, because many false prophets have gone out into the world."
Here, the Apostle John warns against the acceptance of every spiritual teaching without scrutiny. The presence of false prophets necessitates a testing of spirits to confirm their divine origin.

3. Acts 17:11 · "Now the Bereans were more noble-minded than the Thessalonians, for they received the message with great eagerness and examined the Scriptures every day to see if these teachings were true."
The Bereans are commended for their diligence in verifying the teachings of Paul and Silas against the Scriptures. Their example serves as a model for believers to follow, highlighting the importance of scriptural validation.

The Role of Discernment

Discernment is a spiritual gift and a necessary skill for testing teachings. It involves the ability to distinguish between truth and error, often requiring a deep understanding of biblical doctrine and a sensitivity to the Holy Spirit's guidance. The Apostle Paul, in 1 Corinthians 12:10, lists discernment of spirits as one of the gifts of the Spirit, underscoring its importance in the life of the church.

Warnings Against False Teachings

The New Testament contains numerous warnings about false teachers and doctrines. Jesus Himself cautioned His followers in Matthew 7:15, "Beware of false prophets. They come to you in sheep’s clothing, but inwardly they are ravenous wolves." The imagery of wolves in sheep's clothing emphasizes the deceptive nature of false teachings, which can appear benign or even beneficial.

The Apostle Paul, in his letters, frequently addresses the issue of false teachings. In Galatians 1:6-9, he expresses astonishment that the Galatians are turning to a different gospel, which is no gospel at all. He pronounces a curse on anyone, even an angel from heaven, who preaches a gospel contrary to the one they received.

Practical Application

Testing all teachings requires a commitment to studying the Scriptures and a willingness to question and evaluate teachings against the biblical text. It involves prayerful consideration and often consultation with mature believers or church leaders. The goal is to ensure that one's faith is grounded in truth and that the church remains faithful to the apostolic teachings.

In summary, the biblical mandate to test all teachings is a safeguard for the believer and the church, protecting against deception and ensuring adherence to the truth of God's Word.