We have seen that the mind of man, by its very constitution, has certain implanted truths which it believes from the necessity of its nature, and that these are the foundation of all acquired knowledge, and the guide to all truth. We have seen that, independently of a revelation, we have no other sources of knowledge except these intuitions, the experience of ourselves and others, and the deductions of reasoning. We have examined as to the amount of knowledge to be gained from these sources in regard to the nature of mind, the laws of the system of which it is the essential part, the immortality of the soul, our prospects after death, and the character and designs of our Creator. In discussing the last topic, it has been assumed that the grand and ultimate design of the Creator is "to produce the greatest possible happiness with the least possible evil." We have examined, at some length, the chief faculties and laws of the human mind, for the purpose of exhibiting their adaptation to this design. We now proceed to a brief review of this portion as a summing up of the evidence sustaining the proposition that the grand end of the Creator, in forming {191}mind, is to produce the greatest possible happiness with the least possible evil. As preliminary, however, we need to refer to one principle. Whenever we find any contrivances all combining to secure a certain good result, which, at the same time, involves some degree of inevitable evil, and then discover that there are contrivances to diminish and avoid this evil, we properly infer that the author intended to secure as much of the good with as little of the evil as possible. For example, a traveler finds a deserted mine, and all around he discovers contrivances for obtaining gold, and, at the same time, other contrivances for getting rid of the earth mixed with it. The inevitable inference would be that the author of these contrivances designed to secure as much gold with as little earth as possible; and should any one say that he could have had more gold and less earth if he wished it, the answer would be that there is no evidence of this assertion, but direct evidence against it.