Art and how it helps

I always wonder what is it about art - good art - that makes viewing it such a wonderful experience ? What is it about the play of light and shadow, the use of color , the choice of the subject and the actual composition of the whole painting , that makes such an impact on the viewer's eye ? Here it could even be a doodle by my six year old , that i sometimes like looking at- put up on my fridge , that some how seems to calm me down and makes me breathe easier . Maybe its because we associate certain images with certain lasting values, that the very idea that those values exist , be it ever so transient , even in a child's doodle , that makes this madness of everyday existence seem bearable !
The solidness of red in an apple , the deep blue of a sky and the lovely pure yellow of a glowing Sun - these images in a child's painting are reasssuring that the Sun will rise again , another day will begin for another child to look at it and put it down on paper , to make sense to another person trying to make sense of an otherwise chaotic world ....
More musings later ......