How did Seneca’s writings connect virtue with happiness?

For Seneca the Younger, happiness is inextricably linked to the pursuit of wisdom and virtue, which he viewed as the only true goods.12

In his Stoic writings, such as the Moral Letters to Lucilius, Seneca argued that by identifying with reason rather than physical desires or passions, an individual can achieve a state of inner stability. Because wisdom and virtue are matters of the intellect and remain under an individual's control, they protect the person from the unpredictable "play of fortune" that causes suffering for those who pursue material wealth or physical pleasure.132

Seneca emphasized that this quest is open to all human beings due to their shared capacity for reason. By prioritizing this rational nature, a wise person transcends the accidents of birth and external circumstances, finding happiness in a life governed by natural law and the community of rational beings.12