Glory cannot be added to the gods from without; they have made their laws not to receive glory but to communicate glory to men. The sole sphere of justice is the moral actions of men with regard to other men; inward sins are sins only so far as they have outward effect, and inward justice is not justice without outward practice.[542] In the _Cena_ Bruno had already made practical use of this principle in maintaining that the Scriptures teach not science, but an ideal of conduct, and therefore that any argument from them as to the actual constitution of the world is devoid of compelling force, while, on the other side, no scientific theory or hypothesis can be ruled out simply because it is contradicted by any statement in the Scriptures. They were written, not in the service of our intellect to instruct us in philosophy, but for the grace of our mind and heart, ordaining by their laws what should be our behaviour in the moral life. The Scriptures were written in the language and adapted to the intelligence of the vulgar, the people of the time. "A historian making use of words which the ordinary man could not understand, would be absurd; and still more so would be one who desired to give to a whole people a law and model of life, if he were to employ terms which he alone or very few could understand, and should waste time over matters indifferent to the end for which the laws were ordained. For this reason Alghazel said that the function of the books of the law was not so much to probe the truth of things, or speculation, as to promote good customs," and to provide for the welfare of republics and of humanity. To use the terms of science where there is no need, is to ask that the vulgar, the foolish many, from whom only conduct is required, shall have a special comprehension,--to ask that the hand shall have the eye, whereas it is not made by nature to see, but to work, and to obey the eye.[543] The revelation of the Scriptures is accordingly reduced to that of a moral ideal, to be enforced upon the ordinary man by the threat of future punishment and promise of future reward; but it is an ideal which the wise man would acquire by the light of reason alone, and which he would pursue for its own sake.