Rajab Ali Khayyat (may God have mercy on him) often emphasized that sin does not distance a person from God all at once; rather, it first blinds the heart. In his view, many people do not lose their way because they fail to recognize the truth, but because their hearts gradually become numb to it. He believed that when a person is careless about their gaze, their speech, and their intentions, they slowly lose the ability to discern right from wrong. At that point, someone may worship for years, yet move in the wrong direction.

The deeper lesson in this teaching is that piety is not merely avoiding outward sins, but preserving the sensitivity of the heart. When the heart is alive, it quickly recognizes mistakes; but when it becomes darkened, even wrongdoing can appear normal and justifiable. This is why Rajab Ali Khayyat placed greater emphasis on inner vigilance and purity of the heart than on the sheer quantity of outward religious acts.