The inference is obvious. If we would use Spirit we must follow the law of the Spirit which is "Goodness." This is the only limitation. If our originating intention is good, we may employ the spiritual power for what purpose we will. And how is "goodness" to be defined? Simply by the child's definition that what is bad is not good, and that what is good is not bad; we all know the difference between bad and good instinctively. If we will conform to this principle of obedience to the generic law of the Spirit, all that remains is for us to study the law of the proportion which exists between the more and less fully integrated modes of Spirit, and then bring our knowledge to bear with determination. IV The law of spirit, to which our investigation has now led us, is of the very widest scope. We have followed it up from the conception of the intelligence of spirit, subsisting in the initial atoms, to the aggregation of this intelligence as the conscious identity of the individual. But there is no reason why this law should cease to operate at this point, or at any point short of the whole. The test of the soundness of any principle is that it can operate as effectively on a large scale as on a small one, that though the nature of its field is determined by the nature of the principle itself, the extent of its field is unlimited. If, therefore, we continue to follow up the law we have been considering, it leads us to the conception of a unit of intelligence as far superior to that of the individual man as the unity of his individual intelligence is superior to that of the intelligence of any single atom of his body; and thus we may conceive of a collective individuality representing the spiritual character of any aggregate of men, the inhabitants of a city, a district, a country, or of the entire world. Nor need the process stop here. On the same principle there would be a superior collective individuality for the humanity of the entire solar system, and finally we reach the conception of a supreme intelligence bringing together in itself the collective individualities of all the systems in the universe. This is by no means a merely fanciful notion. We find it as the law by which our own conscious individuality is constituted; and we find the analogous principle working universally on the physical plane. It is known to physical science as the "law of inverse squares," by which the forces of reciprocal attraction or repulsion, as the case may be, are not merely equivalent to the sum of the forces emitted by the two bodies concerned, but are equivalent to these two forces multiplied together and divided by the square of the distance between them, so that the resultant power continually rises in a rapidly-increasing ratio as the two reciprocally exciting bodies approach one another.