What kind of people is Les talking about in this passage?
The speaker is talking about people genuinely concerned about dealing with God on His premises—true believers—not a flash in the pan who merely walk an aisle or join a church to fulfill a ritualistic demand. For such genuine believers, God imputes righteousness, gives power to live pleasing to Him, and picks them up when they fall.
Les explains that he is talking about people who are genuinely concerned about dealing with God on His premises, not a flash in the pan—someone merely walking down an aisle, joining a church, or fulfilling a ritualistic demand. He clarifies that for a genuine believer those actions are well and good, but doing them only to satisfy a ritual is not enough. Earlier he notes that when a person truly and honestly believes Christ accomplished everything on their behalf, God imputes His righteousness to them and gives them power to live a life pleasing in His sight. Though believers will fall and trip, God is like a patient young mother who picks them up, says they are forgiven and cleansed, and tells them to move on. For the true believer, this book promises.