What are the dangers of formalism in Christianity?

The dangers of formalism are significant as it can create a deceptive sense of assurance in one's spiritual state, masking true spiritual barrenness. J.C. Ryle emphasizes that formalism can dull the conscience and harden the heart, leaving individuals devoid of genuine faith and reliance on Christ. Scriptural admonition reveals that God sees through superficial practices and desires genuine heart transformation. Without such transformation, all external religious activities are ultimately worthless, and individuals remain in grave spiritual danger, lacking true communion with God.