In Stephen King’s novel "Rose Madder," the quote "It's best to be ruthless with the past" emphasizes the importance of confronting and moving on from previous experiences. The past can hold individuals back, often preventing them from healing and growing. Embracing a ruthless attitude towards past mistakes and traumas can lead to liberation and a renewed sense of self.

This perspective encourages readers to acknowledge their history but not allow it to define them. By being uncompromising in letting go of what has already happened, one can create space for new beginnings and personal transformation. This theme resonates throughout the narrative, highlighting the struggle between past and present.