Both "The Old Man and the Sea" and "Macbeth" share the theme of tragedy, but they explore it in different contexts. To understand the specific themes they have in common, you can visit the website www.sparknotes.com/lit and navigate to the respective study guides for both works. Once there, look for the sections titled "themes," "symbols," or something similar. These sections will provide you with a detailed analysis of the themes explored in each work, including any similarities they may have. If you have any specific questions about the themes once you have researched them, feel free to ask!