The power of self-education
Nathaniel "Nat" Bowditch's journey is emblematic of the potential of self-directed learning. From an early age, despite financial constraints and societal norms, Nat possesses an insatiable curiosity. He wants to learn as much as he can and dreams of attending Harvard University. Even as he becomes an indentured servant and is forced to give up formal education, Bowditch doesn't let these challenges thwart his intellectual growth. Nat begins to borrow as many books as he can and seeks out knowledge on his own. He learns more about mathematics and Latin, among many other subjects. Despite not receiving a formal education, Nat's intelligence and knowledge match (and often surpass) the expertise of some of his formally-educated peers. Through this theme, Latham stresses how ingenious and unrelenting Nat was and highlights that true education is not limited to classrooms.
The nature of love
The nature of love is one of the most significant and complex themes in the novel. First, Carry On, Mr. Bowditch explores the love of family. His family heavily influences Bowditch's early life. His decisions often stem from his love and sense of responsibility toward his family (even when those decisions are made for him). Despite the difficult situations, Nat is put in because of his family, he still loves them and partially understands where they are coming from.
Additionally, the book explores love in the context of romantic relationships. Over the course of the novel, Bowditch's relationship with his wives (particularly his first wife, Elizabeth) is portrayed with tenderness and devotion. Even in the face of personal tragedies, like the loss of their children, their bond remains strong. He loves each of them in their own way, illustrating the joys and pains inherent in romantic love.
Leadership
In a period where brute force and authoritative command were the norm on ships, Bowditch stands out as a different kind of leader. Rather than using fear to command his crew, he believes in their potential, educates them, and treats them with respect. He loves his crew and thinks that they are exceptionally capable people. He understands that by empowering and uplifting others, he not only garners loyalty but also ensures the success of his missions, thereby increasing his own standing.
