The theme of self - discovery can be seen in 'Old Joy'. As the characters interact during their journey, they might learn more about themselves, their desires, and what they truly value in life. Another theme could be the passage of time and how it affects relationships.
One of the main themes is friendship. It shows the reconnection between two friends and how they navigate their relationship over time. There's also a sense of nostalgia as they recall past experiences together.
In 'Old Joy', the theme of nature can be prominent. The journey they take might be set in natural surroundings, and this could symbolize a search for something pure or a way to escape from the chaos of modern life. Also, the theme of masculinity might be explored as the male characters interact and show different aspects of their identities.