In Cormac McCarthy's novel "No Country for Old Men," the quote emphasizes the permanence of our actions. It suggests that every decision we make leaves an indelible mark on our lives, indicating that we cannot simply erase the consequences. This notion serves as a reminder of the weight and accountability that accompany our choices.

The idea that "every step you take is forever" reinforces the theme of inevitability throughout the narrative. Characters are often confronted with the repercussions of their past decisions, illustrating how actions shape their futures and the world around them. Ultimately, the quote captures a profound truth about existence and the enduring impact of our lives.