A graphic of three circles arranged in a triangular fashion - one for each person of the Holy Trinity. The direct lines between each circle (forming the triangle) read 'is not'. In the center of the triangle is a fourth circle reading 'God'. Each outer circle has a line to the central circle reading 'is'.

Image courtesy Wikimedia Commons (public domain) – https://commons.wikimedia.org/wiki/File:Shield-Trinity-Scutum-Fidei-English.svg