"At one time the benevolent affections embrace merely the family, soon the circle expanding includes first a class, then a nation, then a coalition of nations, then all humanity, and finally, its influence is felt in the dealings of man with the animal world. In each of these stages a standard is formed, different from that of the preceding stage, but in each case the same tendency is recognised as virtue."

“In looking back, with our present experience, we are driven to the melancholy conclusion that, instead of diminishing the number of wars, ecclesiastical influence has actually and very seriously increased it. We may look in vain for any period since Constantine, in which the clergy, as a body, exerted themselves to repress the military spirit, or to prevent or abridge a particular war, with an energy at all comparable to that which they displayed in stimulating the fanaticism of the crusaders, in producing the atrocious massacre of the Albigenses, in embittering the religious contests that followed the Reformation.”

“Men continually forget that Happiness is a condition of Mind, and not a disposition of circumstances, and one of the most common of errors is that of confusing happiness with the means of happiness, sacrificing the first for the attainment of the second.”

“It is abundantly evident, both from history and from present experience, that the instinctive shock, or natural feeling of disgust, caused by the sight of the sufferings of men is not generically different from that which is caused by the sight of the sufferings of animals.”

“There have certainly been many periods in history when virtue was more rare than under the Caesars; but there has probably never been a period when vice was more extravagant or uncontrolled.”

“Terror is everywhere the beginning of religion.”

“Whence has come thy lasting power.”