How do we know if a doctrine is true according to the Bible?

The foundation of identifying true doctrine is the Scripture, which is the authoritative word of God. As noted in 2 Peter 1:20-21, prophecy and teachings in the Bible were inspired by the Holy Spirit, guaranteeing their truthfulness. This means any doctrine that either aligns with or contradicts the Bible's teachings must be rigorously evaluated based on its fidelity to Scripture. Truth is not subjective; rather, it is established by God's revealed Word, and sound doctrine must always conform to the character and attributes of God as presented in the Bible.