The quote "Marriages are made in heaven which is why they cause so much trouble on earth" from Mark Helprin's "In Sunlight and in Shadow" reflects the complex nature of love and commitment. It suggests that while the ideal of marriage may seem divine and blissful, the reality often brings challenges and difficulties. This juxtaposition highlights the contrast between romantic ideals and the practical complexities that come with relationships.

Moreover, Helprin's words hint at the inherent struggles in human connections. While people may dream of perfect unions and eternal love, the everyday realities and burdens of life can lead to conflict and hardship. This insight serves as a reminder that while marriage may begin with high hopes, the journey often requires patience and resilience to navigate the trials that arise.