How did Lucretius connect pleasure and pain with human behavior?

In his poem De rerum natura, Lucretius presents the physical and ethical doctrines of Epicurus, positing that humans naturally seek pleasure and avoid pain.1

Lucretius argues that the ultimate goal of human behavior should be to achieve a balance that maximizes pleasure while minimizing pain. He defines the supreme good as the absence of bodily and mental pain, rather than the pursuit of excessive or dissolute indulgence. To succeed in this, Lucretius emphasizes that individuals must use philosophy to overcome irrational fears—specifically the fear of death and the fear of the gods—which he viewed as primary sources of human misery and emotional turmoil.123

By understanding the atomic nature of the universe and the mortality of the soul, humans can liberate themselves from these anxieties, allowing them to live a life of quietude and simple, sustainable pleasures. Ultimately, Lucretius advocates for an ethical life where virtue and pleasure are inseparable, often found in the cultivation of intimate friendships and a withdrawn, peaceful existence.132