It is true that one often suffers through the evil actions of others; but when one has no part in the offence one must look upon it as a certainty that these sufferings prepare for us a greater happiness. The question of _physical evil_, that is, of the origin of sufferings, has difficulties in common with that of the origin of _metaphysical evil_, examples whereof are furnished by the monstrosities and other apparent irregularities of the universe. But one must believe that even sufferings and monstrosities are part of order; and it is well to bear in mind not only that it was better to admit these defects and these monstrosities than to violate general laws, as Father Malebranche sometimes argues, but also that these very monstrosities are in the rules, and are in conformity with general acts of will, though we be not capable of discerning this conformity. It is [277] just as sometimes there are appearances of irregularity in mathematics which issue finally in a great order when one has finally got to the bottom of them: that is why I have already in this work observed that according to my principles all individual events, without exception, are consequences of general acts of will. 242. It should be no cause for astonishment that I endeavour to elucidate these things by comparisons taken from pure mathematics, where everything proceeds in order, and where it is possible to fathom them by a close contemplation which grants us an enjoyment, so to speak, of the vision of the ideas of God. One may propose a succession or series of numbers perfectly irregular to all appearance, where the numbers increase and diminish variably without the emergence of any order; and yet he who knows the key to the formula, and who understands the origin and the structure of this succession of numbers, will be able to give a rule which, being properly understood, will show that the series is perfectly regular, and that it even has excellent properties. One may make this still more evident in lines. A line may have twists and turns, ups and downs, points of reflexion and points of inflexion, interruptions and other variations, so that one sees neither rhyme nor reason therein, especially when taking into account only a portion of the line; and yet it may be that one can give its equation and construction, wherein a geometrician would find the reason and the fittingness of all these so-called irregularities. That is how we must look upon the irregularities constituted by monstrosities and other so-called defects in the universe. 243. In this sense one may apply that fine adage of St. Bernard (Ep. 276, Ad Eugen., III): 'Ordinatissimum est, minus interdum ordinate fieri aliquid.' It belongs to the great order that there should be some small disorder. One may even say that this small disorder is apparent only in the whole, and it is not even apparent when one considers the happiness of those who walk in the ways of order.