The morals of men are more governed by their pursuits than by their opinions. A type of virtue is first formed by circumstances, and men afterwards make it the model upon which their theories are framed.

The moral duty to be expected in different ages is not a unity of standard, or of acts, but a unity of tendency ... 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.

The animal world being altogether external to the scheme of redemption, was regarded as beyond the range of duty, and the belief that we have any kind of obligation to its members has never been inculcated - has never, I believe, been even admitted - by Catholic theologians.

Pleasures that are in themselves innocent lose their power of pleasing if they become the sole or main object of pursuit.

All over Europe the organs that represent dogmatic interests are in permanent opposition to the progressive tendencies around them, and are rapidly sinking into contempt. In every country in which a strong political life is manifested, the secularisation of politics is the consequence. Each stage of that movement has been initiated and effected by those who are most indifferent to dogmatic theology, and each has been opposed by those who are most occupied with theology.

When men have appreciated the countless differences which the exercise of that judgment must necessarily produce, when they have estimated the intrinsic fallibility of their reason, and the degree in which it is distorted by the will, when, above all, they have acquired that love of truth which a constant appeal to private judgment at last produces, they will never dream that guilt can be associated with an honest conclusion, or that one class of arguments should be stifled by authority.

There is no wild beast so ferocious as Christians who differ concerning their faith.