Bishop Peter Lei’s coat of arms illustrates his motto “Per Crucem ad Lucem” - “Through the Cross to the realm of Light”.
Christ is the Light, and the Light is shed from the Cross. The Chinese motto 共 苦 同 甘 seems to indicate another aspect of the same truth, that one cannot reach Christ the Light except by following the way of the Cross. The dark section of the globe strikingly brings out the dismal effect of the lack of Light.
座右銘為“共苦同 甘”──為基督分擔十字架的重負，俾與基督共享永福。拉丁文座右銘 ，Per Crucem ad Lucem 直譯為“藉十字架到達光明之 境”。