What’s the advantage of load() vs get() in Hibernate?

Explanation of semantics of these methods doesn’t explain the practical difference between them. Practical rule is the following:

• Use get() when you want to load an object

• Use load() when you need to obtain a reference to the object without issuing extra SQL queries, for example, to create a relationship with another object:

  public void savePost(long authorId, String text) {
      Post p = new Post();
      p.setText(text);
  
      // No SELECT query here. 
      // Existence of Author is ensured by foreign key constraint on Post.
      p.setAuthor(s.load(Author.class, authorId));
  
      s.save(p);
  }