The following are taken from written comments made by visitors to Mario Castillo’s solo exhibition, “Nagualism” held at Mac Murray College’s Mobil Art Gallery, Jacksonville, IL from 11-5-94 to 11-26-94.  Comment #6 refers to the largest painting at exhibit, “Terrestrial Iconography”. This mural size painting makes use of ancient art images from throughout the world and continues to demonstrate Castillo’s concern for an artistic fusion of world cultures. In a philosophical way, it is a response to Marshall McLuhan's’s theories about the earth becoming a global village. This work is painted with semen-acrylic and is one of the largest paintings making use of Castillo’s unique style of Perceptualism. It also pays tribute to the first multicultural mural, “The Wall of Brotherhood” which Mario Castillo (who was then a student at the School of the Art Institute of Chicago) created during the summer of 1969 in Chicago’s Pilsen Mexican community on 18th Street.
 
1.  The most magnificent painting with ethereal, spirituality feeling I have ever seen. Complete movement of the universe that can be experienced and I am still understating.
 
2.  Thank you for sharing the gift of unity-the ancient with the present.
 
3.  I hope to see you again at the museum. Wish we could afford your mural for here.
 
4.  Excellent display of many different cultures, vibrant and exciting, a wonderful piece.

5.  I find also overtones of Diego Rivera both in the symbolism and the mural work