divinity was constrained to honour the God of Israel. Next to Judaism and Christianity, the worship of Mithra showed the greatest vitality of all religions in Western Asia, and later even in Europe. So vigorous was it as recently as the commencement of the Christian era, that M. Renan has remarked, that if the Roman world had not become Christian it would have become Mithrastic. In those regions where the dazzling radiance and burning heat of the sun are felt as they are not even imagined in our chill, gloomy climate, it was naturally supposed that if any visible God existed He must be found in the great fiery centre of the world's light and life. Our own day has seen the scientific development of the idea that the sun's force is the source of all the energy of nature. In the homage paid by one of the ancient followers of Mithra, the sun-god, to the God of Israel, may we not see an image of the recognition of the claims of the Supreme by our priests of the sun—Kepler, Newton, Faraday? Men must be more blind than the slaves of Mithra if they cannot recognise an awful, invisible energy behind and above the forces of the solar system—nay more, a living Spirit—God!