"In this volume, I unfold the characteristics of the motive powers, as they are called the orective, the appetent, the impulsive powers; the feelings, the sentiments, the affections, the heart, as distinguished from the Gnostic, the cognitive, the intellect, the understanding, the reason, the head. These motive powers fall under three heads: the emotions, the conscience, the will. It is not to be understood that these are unconnected with each other, or with the cognitive; emotions contain an idea which is cognitive. The conscience may be regarded as combining characteristics of each of the two grand classes; being cognitive as discerning good and evil, and motive as leading to action; the will has to use the other powers as going on to action. Emotion occupies more room than the other two in this treatise, inasmuch as its operations are more varied, and as the account usually given of it (so it appears to me) is more defective"--Introduction. (PsycINFO Database Record (c) 2010 APA, all rights reserved).
"We live in an age in which the reflecting portion of mankind are much addicted to the contemplation of the works of nature. It is the object of the author in this Treatise to "interrogate nature," with the view of making her utter her voice in answer to some of the most important questions which the inquiring spirit of man can put. To guard against misapprehension, he wishes it to be understood that he treats in this book of the Method of the Divine Government in the world rather than in the Church; of the ordinary providence of God rather than his extraordinary dealings towards his redeemed people." (PsycINFO Database Record (c) 2009 APA, all rights reserved).