The song "Driving Wheel" by John Mayall is about a man talking about how he takes care of his woman and gives her everything she needs so she doesn't have to resort to theft or robbery to get by. However, in the midst of the song, the woman leaves and the man is left waiting for her return. He writes her a letter, emphasizing the importance of the message being kept between him and his lover. The driving wheel is a metaphor which means that he is the one who guides and supports her in their relationship. The song portrays the man as being devoted to his woman and doing everything in his power to make her life easier. However, despite his efforts, he is still left waiting for her return. Overall, "Driving Wheel" is a song about commitment, trust, and love. It explores the lengths that one person will go to take care of another and the importance of keeping communication between partners private. It's a classic blues song that captures the essence of a true relationship.