Hermann Hesse said this quote

I realize that some people will not believe that a child of little more than ten years is capable of having such feelings. My story is not intended for them. I am telling it to those who have a better knowledge of man. The adult who has learned to translate a part of his feelings into thoughts notices the absence of these thoughts in a child, and therefore comes to believe that the child lacks these experiences, too. Yet rarely in my life have I felt and suffered as deeply as at that time.