It is quite otherwise with subjects accessible to sense or reasoning: here authority is useless, only reason can know them. Authority and reason have their separate rights: a moment ago one had all the advantage; here the other is queen in her turn. But since subjects of this kind are suited to the mind’s reach, it has perfect freedom to concern itself with them; its inexhaustible fertility produces continually, and its discoveries can be at once without end and without interruption … Thus it is