This was the argument of Sizzi, an astronomer of some note, who tried to prove that Jupiter's moons could not exist. I wonder whether you can see the flaw in it: "There are seven windows given to animals in the domicile of the head, through which the air is admitted to the tabernacle of the body, to enlighten, to warm, and to nourish it; which windows are the principal parts of the microcosm, or little world, two nostrils, two eyes, two ears, and one mouth. So, in the heavens, as in a microcosm, or great world, there are two favorable stars, Jupiter and Venus; two unpropitious, Mars and Saturn; two luminaries, the sun and the moon; and Mercury alone undecided and indifferent, from which, and from many other phenomena of nature, such as the seven metals, etc., which it were tedious to enumerate, we gather that the number of planets is necessarily seven. Moreover, the satellites are invisible to the naked eye, and therefore can exercise no influence over the earth, and therefore would be useless, and therefore do not exist. Besides, as well the Jews and other ancient nations, as modern Europeans, have adopted the division of the week into seven days, and have named them from the seven planets. Now, if we increase the number of the planets, this whole system falls to the ground." I think, brethren, that I have heard the same kind of argument advanced many times with reference to spiritual matters; that is, an argument from theory against fact; but facts will always overturn theories all the world over, only that, sometimes, it takes a good while before the facts can be absolutely proved. It is a singular thing, and another instance of the power and wisdom of God, that though the satellites of Jupiter are constantly being eclipsed, as is natural enough from their rapid revolutions around him, yet they are never all eclipsed at one time. One moon may be eclipsed, and perhaps another, or even three out of the four; but there is always one left shining; and, in like manner, God never takes away all the comfort of his people at once, there is always some ray of light to cheer them. There is a great deal more to be learned from Jupiter; but having introduced you to him, I will leave you to examine him for yourselves, and to get all you can out of him. * * * * *