Doctrine acts like guardrails, keeping the church safe from drifting into error. Paul urged Timothy to “guard the deposit entrusted to you” (1 Tim. 6:20). Guardrails are not meant to restrict life but to preserve it. Sound doctrine protects believers, guides the church in holiness, and ensures faithfulness to the gospel. To reject doctrine is to drive without boundaries; to embrace it is to walk securely in truth.