For the modern man, freedom, especially freedom of intellectual life, means _independence from external ties, from all authority_, or, to express it positively, absolute right of self-determination, _autonomy_. He does not recognize any law or rule which he has not imposed upon himself. In civil life, of course, it is a principle that man must submit to external, legal restraint in many things that do not directly concern his own person, but only so far as is necessary in order that others, too, may enjoy the same freedom; but also here every citizen must be able to share in the legislation, according to the rules of constitutional or republican government. But he must be free from every external restraint in whatever touches the core of his personality, his feeling, desire, thought, and the expression of his thought. It should now be clear, from what has been said, what is meant by _freedom of science_. It means independence from every external authority and restraint in research and teaching, the unhindered development and assertion of one’s own intellectual personality. Man must let himself be directed only by his own judgment and his instinct for the truth, or his personal need, without heeding dogmas, Church laws, tradition, or any other external norm whatsoever. This is particularly true in the _domain of philosophy and religion_, in questions regarding the world and life, and in fundamental social questions. This is principally, and almost exclusively, the field in which an authoritative influence of the Church, or state, or society in general, is to be feared. Hence the importance of the question of the freedom of science in this field. This is also the manner in which the advocates of modern freedom of science unanimously describe it.