The period of Catholic ascendancy was on the whole one of the most deplorable in the history of the human mind. . . . The spirit that shrinks from enquiry as sinful and deems a state of doubt a state of guilt, is the most enduring disease that can afflict the mind of man. Not till the education of Europe passed from the monasteries to the universities, not till Mohammedan science, and classical free thought, and industrial independence broke the sceptre of the Church, did the intellectual revival of Europe begin.

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

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 are some poisons which, before they kill men, allay pain and diffuse a soothing sensation through the frame. We may recognize the hour of enjoyment they procure, but we must not separate it from the price at which it was purchased.

Spain and southern Italy, in which Catholicism has most deeply implanted its roots, are even now, probably beyond all other countries in Europe, those in which inhumanity to animals is most wanton and unrebuked.

Routine shortens and variety lengthens time, and it is therefore in the power of men to do something to regulate its pace. A life with many landmarks, a life which is much subdivided when those subdivisions are not of the same kind, and when new and diverse interests, impressions, and labours follow each other in swift and distinct successions, seems the most long.

Nothing, indeed, could be more unlike the tone of the [Patristic] Fathers, than the cold, passionless, and prudential theology of the eighteenth century; a theology which regarded Christianity as an admirable auxiliary to the police force, and a principle of decorum and of cohesion in society, but which carefully banished from it all enthusiasm, veiled or attenuated all its mysteries, and virtually reduced it to an authoritative system of moral philosophy.