How do I write or structure my personal statement in a balanced way when I am interested or taking more than one course?

Although it would be quite helpful if these courses that are taken together are related to each other, whether or not two or three courses are related, an effective personal statement must give balance to the amount time (or words) is spent on a single subject. An ideal way of managing such task is to assign one or two paragraphs to one course subject. I myself, for example, wrote my personal statement for three different subjects (Philosophy, International Development and PPE) directed at different universities. I had my first paragraph, after my introduction, centered around my interest of Philosophy, followed by a second paragraph explaining how some of the questions I was lead to ask in Philosophy sparked my interest in Development, further leading to my interest in areas of Politics and Economics too, as explained in another paragraph. Allocating parts of your statement to each course you try to demonstrate interest helps each university identify the answer to the question of why you want to study that particular subject in each paragraph. In addition, showing a connection of the two or more subjects of your interest (how one interest led to another) helps unify your personal statement as well as distinguish yours from that of others.