How to understand "a book is like a person" in calligraphy?

If you love calligraphy and achieve something, it is not difficult to understand that "books are like people". Honest, introverted, written words, will also be a king of gas immersion shot out, that kind of feeling is not the average person can show. In other words, when you see the words, you feel the aura that the words inexplicably reveal. What people will have what words, giving people a very different feeling.