The most profound and exciting quest of the ages is the search for the ultimate meaning of the universe. Not many men are philosophers as they engage in this quest; but all pursue it, either with sharp awareness or with but a dim realization of their goal. Esthetic and social activity as well as theological or philosophical inquiry is significant indications of the universality and earnestness of this seeking after the final meaning of the world, which supports the life of men. Whether the result takes the form of sensuous pleasure, an ethical code, a metaphysical system, or a religious creed, the assumption is that a formula for living has been found which corresponds in some sense to what the universe finally means. Usually the clearest expression of this formula employs the vocabulary of religion, and particularly the word "God." The Old Testament, which the Jews follow as their holy book, tells them that the God is one. They have to believe on the oneness and purity of God.
And he said, tomorrow. And he said, be it according to thy word; that thou mayest know that there is none like unto the LORD our God. (Exodus 8:10)
Unto thee it was showed, that thou mightest know that the LORD he is God; there is none else beside him. (Deuteronomy 4:35)
Know therefore this day, and consider it in thine heart, that the LORD he is God in heaven above, and upon the earth beneath: there is none else. (Deuteronomy 4:39)
And he said, LORD God of Israel, there is no God like thee, in heaven above, or on earth beneath, who keepest covenant and mercy with thy servants that walk before thee with all their heart: (1 Kings 8:23) ...