Why is knowing the truth essential for Christians?

In 2 Timothy 3:15, Paul writes that from childhood Timothy had known the Holy Scriptures which are able to make one wise unto salvation through faith in Christ Jesus. This emphasizes that truth, particularly biblical truth, is critical for understanding our need for salvation and the means by which we receive it — faith in Christ alone. Moreover, understanding the truth protects believers from deception and false teachings that can lead to spiritual ruin, as warned against in 2 Thessalonians 2:10, where those who do not love the truth are susceptible to strong delusion. Thus, Christians are called to diligently seek, learn, and hold fast to the truth of God’s Word.