18. From the circumstance that evil and falsity are opposed to good and truth, it is evident that truth cannot be conjoined with evil, nor good with the falsity of evil; for should truth be adjoined to evil, it is no longer truth, but falsity, because it has been falsified; and should good be adjoined to the falsity of evil, it is no longer good, but evil, because it is adulterated. Still, falsity not of evil can be conjoined with good.