The end of the matter is that there is not a single limitation or other accident that we can possibly ascribe to Eyn Sof, blessed be He, except that He is the Master of all. The natural world that we see and experience with our eyes and other senses was made by Him just as it is, with all the sense perceptions to which it gives rise. But He is in no way subject to the limits of any order or law. Whenever we say that something would not have been possible without a certain given factor, what we mean is that, according to the way of gradation and measure, it would have been impossible otherwise (see Etz Chayim, Igulim VeYosher 11b).
Thus it is true to say that the way of gradation and measure made it impossible to bring forth the lower worlds directly from Adam Kadmon, for example, in order for them to receive this light. For according to the way we understand the nature of graded measure, it is not possible for a lowly creature to receive the light of the Supreme Keter. But all this is after we know that Eyn Sof wanted graded measure. If Eyn Sof had not wanted this, He could have done it any way He chose.