Suppose that you met a friend whom you've missed for a long time. How could the friend know that you've missed if you don't express it? You can communicate with others and bear good fruit from the relation when you practice and express your love in your heart. Just knowing a lot of the words in 66 books of the Bible does not lead you to be blessed. Only when you act by the words, can God be pleased with it and give you answers and blessing (James 2:17).