To return, his views on science, as we have already seen, were the same as those of the contemporary students of natural philosophy. Their teachings he accepted, and, so far, he can be compared to a theologian of the present day, who accepts evolution and explains it to suit himself. His world was framed on what is commonly called the Ptolemaic system. He was no flat-earth man like the present Ulama of Islam; God had “spread out the earth like a carpet,” but that did not hinder him from regarding it as a globe. Around it revolve the spheres of the seven planets and that of the fixed stars; Alphonso the Wise had not yet added the crystalline sphere and the _primum mobile_. All that astronomers and mathematicians teach us of the laws under which these bodies move is to be accepted. Their theory of eclipses and of other phenomena of the heavens is true, whatever the ignorant and superstitious may clamor. Yet it is to be remembered that the most important facts and laws have been divinely revealed. As the weightiest truths of medicine are to be traced back to the teaching of the prophets, so there are conjunctions in the heavens which occur only once in a thousand years and which man can yet calculate because God has taught him their laws. And all this structure of the heavens and the earth is the direct work of God, produced out of nothing by His will, guided by His will, ever dependent for existence on His will, and one day to pass away at His command. So al-Ghazzali joins science and revelation. Behind the order of nature lies the personal, omnipotent God who says, “Be!” and it is. The things of existence do not proceed from Him by any emanation or evolution, but are produced directly by Him. [Sidenote: THE THREE WORLDS]