The quote emphasizes the importance of passion and enthusiasm in maintaining the purity of heart and the safety of virtue. It suggests that without a strong emotional commitment, virtues may not be fully protected or practiced. This perspective aligns with the idea that moral and ethical principles are not just intellectual concepts but require a deep, emotional investment to truly live by them.
It suggests that for virtues to be genuinely upheld and for a person to lead a morally sound life, there must be an underlying passion that drives and safeguards these values.