Sentence 1: My friend took a bookbinding class. 
 Sentence 3: With a lot of practice, her books became very beautiful 
 Sentence 4:  Now, she sells her books 
 Sentence 5:  She is making a living doing what she loves to do 
 Option 1: She knew so much that she should have taught it herself. 
 Option 2: She had always wanted to learn to make books.