Humans are likely the only species with the ability to take themselves seriously. What does that mean? For Harry Frankfurt, this ability is inextricably linked to two other aspects of human nature: reason and love. Reason governs our intellect, while love governs our heart. They provide the reasons for our actions and thus play a crucial role in our self-understanding as free agents who reflect on themselves. However, according to Frankfurt, it is love that rules practical reason. To love means to care: to desire, want, or long for something intensely. Therefore, it is the logic of care that fundamentally shapes our thinking and actions.