In "Trains and Lovers" by Alexander McCall Smith, the idea that love knows no bounds is a central theme. The quote suggests that within every person, there exists a multitude of emotional spaces or 'rooms' that love can fill. This implies that love can manifest in various forms, sometimes unexpectedly filling these different aspects of our hearts.

This perspective invites readers to reflect on their own experiences with love, indicating that love's potential is vast and limitless. Our hearts can house diverse relationships and feelings, emphasizing the beauty and complexity of human connections. McCall Smith encourages us to recognize the abundant possibilities love brings into our lives.