What does Alfred marshall mean by cool heads but warm heart?

Alfred Marshall's phrase "cool heads but warm hearts" emphasizes the importance of balancing rational thinking with compassion in decision-making, particularly in economics and social policy. It suggests that while it is crucial to approach problems analytically and with a level-headed mindset, one should also maintain empathy and care for the human aspects involved. This combination fosters thoughtful, yet humane solutions that consider both data and the well-being of individuals. Ultimately, Marshall advocates for a blend of intellect and kindness in addressing societal issues.