These thirteen principles (‏שלשה עשר עקרים‎) may be divided into three groups, according to their relation to the three principles:—1. Existence of God. 2. Revelation. 3. Reward and punishment. The first group includes the first five principles, the second the next four, and the third the remaining four. In this order they will now be considered. 1. EXISTENCE OF GOD ‏מציאות הבורא‎. The notion of the existence of God, of an invisible power which exercises its influence in everything that is going on in nature, is widespread, and common to almost the whole human race. It is found among all civilised nations and many uncivilised tribes. The existence of God may be regarded as an innate idea, which we possess from our earliest days. This is the origin of Natural Religion. Thinkers of all ages and nations have attempted to confirm this innate idea by convincing arguments. Prophets and divine poets have frequently directed the attention of those whom they addressed to the marvels of nature in order to inspire them with the idea of an All-wise and All-powerful Creator. “Lift up your eyes on high, and behold who hath created these? Who is He who bringeth them forth by number? All of them He calleth by name, by the greatness of His might, and for that He is strong in power, not one is lacking” (Isa. xl. 26). “The heavens declare the glory of God, and the firmament sheweth His handywork” (Ps. xix. 2). The regularity in the rising and setting of the heavenly bodies, which enables us to foretell the exact time and duration of an eclipse of the sun or the moon, is certainly a strong argument for the belief that there is a mighty and wise Creator who fixed the laws in accordance with which these luminaries move. “Beautiful are the luminaries which our God has created. He has formed them with knowledge, reason, and understanding; He endowed them with power and strength to rule in the midst of the world. Full of splendour and beaming with light, they illumine the whole world; they rejoice when they rise, they are glad when they set, doing in reverence the will of their Master” (Sabbath Morning Service). A similar regularity we notice when looking on the face of the earth. The various seasons of the year, each with its peculiar aspect and influence, the sequence of day and night at regular intervals, the gradual and systematic development of vegetable and animal life—all point forcibly to the fact that these things do not owe their existence to chance, but to the will of an Almighty and All-wise Creator.