If I only know what I am convinced of and have found out myself, if I really only know what I have experienced myself, then indeed I cannot say that … - Johann Gottlieb Fichte

While all these are disturbed and divided by the multifarious objects to which their thoughts must be applied, the Philosopher pursues, in solitary silence and in unbroken concentration of mind, his single and undeviating course towards the Good, the Beautiful, and the True; and that is his daily labour, to which others can only resort at times for rest and refreshment after toil.

Wenn ich nur dasjenige weiß, und von ihm überzeugt bin, was ich selbst gefunden, – nur dasjenige wirklich kenne, was ich selbst erfahren habe, so kann ich in der That nicht sagen, daß ich über meine Bestimmung das Geringste wisse; ich weiß blos, was Andre darüber zu wissen behaupten.

History is mere Empiricism; it has only facts to communicate, and all its proofs are founded upon facts alone. To attempt to rise to Primeval History on this foundation of fact, or to argue by this means how such or such a thing might have been, and then to take for granted that it has been so in reality,is to stray beyond the limits of History, and produce an a priori History; just as the Philosophy of Nature, referred to in our preceding lecture, endeavoured to find an a priori Science of Physics.