We have not been led by servile adhesion to custom, or the affectation of making a display, but by the desire of making our meaning more clear and evident to theological readers, especially those whose native language is not English, and of introducing into our English theological literature those definite and precise modes of reasoning which belong to these great schoolmen. We can easily understand the aversion of our opponents to the schoolmen, in which they are only following after their predecessor, Martin Bucer, who said, albeit in Latin, _Tolle Thomam et delebo Ecclesiam Romanam_, "Take away Thomas, and I will destroy the Roman Church." To the personal remarks of the critic in regard to the author and the history of his religious opinions we give a simple _transeat_, and pass to what semblance of argument there is in rejoinder to the thesis defended in the _Problems of the Age_. {180} The critic says that the same process of logic which the author employs against his opponents would destroy his own statements. This is a mere assertion, without a shadow of proof, and we meet it with a simple denial. It is, moreover, a piece of triviality with which we have no patience. It is the language of the most wretched and shallow scepticism, conceived in the very spirit of the question of Pontius Pilate to our Lord, "What is truth?" We have been engaged for thirty years in the study of philosophy and theology, and have carefully examined and weighed the matters we have undertaken to discuss. The substance of the doctrine we have presented is that in which the greatest minds of all ages have been agreed; and it has been proved and defended against every assault in a manner so triumphant that its antagonists have nothing to say, but to deny the first principles of logic, the possibility of science, the certainty of faith. There are, undoubtedly, certain minor points which are open to question and difference of opinion. But, as to our main thesis, that the Catholic dogmas are not contradictory to anything which is known or demonstrable by human science, we defy all opponents to refute it.