J.C. Ryle addresses the pervasive issue of formalism in Christianity, emphasizing that true religion is not merely a matter of outward appearances but must stem from a genuine heart transformation. He warns that many professing Christians may engage in religious practices without true faith or heartfelt devotion, which ultimately leads to spiritual emptiness. Ryle highlights that true Christians are those whose faith is rooted in their hearts, and he cautions that authentic faith often faces ridicule and is not popular among the masses. He encourages believers to examine their hearts and seek a genuine relationship with God, rather than settling for a hollow form of godliness.