Now, indeed, we easily understand the demand for freedom of thought. It is unintelligible how an external authority, a divine revelation or infallible Church, could have ever approached man, assured him of the truth of its teaching, and laid upon him in consequence of this testimony the obligation of accepting it as true. “An external authority,” we are assured, “be it ever so great, will never succeed in arousing in us a sense of obligation; its laws, be they ever so lofty and earnest, will be deemed arbitrary, simply because they come from without” (_Sabatier_, La Religion et la Culture moderne, apud _Fonsegrive_, Die Stellung der Katholiken gegenueber der Wissenschaft, Deutsch von _Schieser_ (1903), 10). Man accepts only what he himself has produced, what is congenial to his individuality, what is in harmony with his personal intellectual life. In the place of truth steps “personal conviction,” the shaping of one’s views and ideals; in the place of unselfish submission to the truth steps the “development of one’s intellectual individuality,” the “evolution of one’s intellectual personality”; in a word, free-thought. Exterior authority can no longer impose an obligation. “Is there on earth,” asks _Paulsen_, “an instance where authority can decide for us in matters of belief and thought?” And he answers: “There is none; there cannot be on this earth an infallible teaching authority.” And why not? “Philosophy and science must refuse to recognize such an authority.... If I could believe all that the Church or the Pope teaches, this one thing I could never believe, that they are infallible; it would include a resolution, once for all, to renounce my own judgment regarding whatever they declare true or false, good or bad; it would be the utter renunciation of the use of my reason and conscience.” (Ibid. 51-53. We shall often cite the testimony of _Paulsen_ for the purpose of illustrating modern thought, partly because he is no longer living, partly because he is quite an outspoken representative of the modern view of the world, though generally regarded as moderate. Moreover, he is without doubt one of the most widely read of the modern German philosophers.)