Only once you have gained a tree spirit’s trust will it be possible to see her or his face hidden within the bark. Consider it a great blessing, for very few trees will show their face to a human.
Only when a tree trusts you deep within its spirit will the tree bare its vulnerable face to you. By showing you its face, the tree spirit is telling you that it trusts you and considers you to be a possible friend. If you are blessed enough to see the face of a tree smiling at you, smile back, and know you have found a friend.