In learning about the world of sandplay therapy (and many more topics and experiences that make for an interesting life), it is important to cultivate Shoshin - a word from Zen Buddhism meaning "beginner's mind". It refers to having an attitude of openness, eagerness, and lack of preconceptions when studying a subject, even when studying at an advanced level, just as a beginner would.
This approach is well stated in Mythology: An Illustrated Guide edited by Roy Willis. In the introduction, Robert Walter shares his view on this book about myths:
"Read these pages as you would read a dream journal, for the task of the modern human being is to interiorize mythic symbology...approach this book with an open mind, with the innocence of the child for whom the world is inherently magical...you will explore exotic landscapes and discover untold wonders...you will learn much about your forbears...and more about yourself..."