How do we know the doctrine of the sufficiency of scripture is true?

The doctrine of the sufficiency of scripture asserts that the Bible is complete and entirely adequate for teaching and guiding believers. This is supported by passages such as 2 Timothy 3:16-17, which states that all scripture is inspired by God and is useful for teaching, reproof, correction, and training in righteousness. The psalmist's declaration that God's Word is a lamp unto his feet further underscores the notion that scripture provides a comprehensive framework for life, illuminating our understanding of God’s nature and His will for us. When we rely solely on scripture, we acknowledge that it alone is authoritative and capable of equipping us for every good work.