What does being a 'blind leader' mean in a biblical context?

In Matthew 15:14, Jesus refers to the Pharisees as 'blind leaders of the blind.' This term designates individuals who, due to their lack of spiritual insight and reliance on human tradition, lead others into error. They may express religious fervor, but their teachings do not align with God’s revelation in Scripture, ultimately resulting in spiritual death. Thus, true leaders must point others to Christ and rely on the truth found in the Bible, avoiding the pitfalls of human philosophy or man-made doctrines.