“The difference between the child, the teenager, the adult and the old person is very easily demonstrable. When a child doesn't understand something, he asks questions, and if you can explain things well, the child will understand. The teenager can only understand something if he sees it in a book, so he distrusts any explanation. The adult is not interested in understanding anymore but merely accepting, and his concept of truth is ruled by the majority. The old person doesn't trust the majority because he was betrayed too many times, and instead gets fixated on his own thoughts until he dies. One then experiences the death of the mind when he becomes a teenager and the death of the heart when he becomes an adult, and as an old person he finally experiences death to the meaning of life, and when there is nothing more to live for, life itself ends. This is why you must be like a little child if you wish to understand the kingdoms of God. The happiness of the child comes from discovering new things, learning new things, doing new things, and falling in love with everything.”