Painted 19th century Tibetan mandala of the Naropa tradition. Vajrayogini stands in the center of two crossed red triangles, Rubin Museum of Art.

Note: This image is in the public domain. Source: Wikimedia Commons. - ed.

This is a great and wonderful book, also highly recommended by Dr. Deepak Chopra. It explains how raising individual awareness towards cosmic expansion lifts world consciousness to a higher plateau.