With us philosophy is not practised as a private art, as it was by the Greeks, but has a public place, and should therefore be employed only in the service of the state.
When reflection, feeling, or whatever other form the subjective consciousness may assume, regards the present as vanity, and thinks itself to be beyond it and wiser, it finds itself in emptiness, and, as it has actuality only in the present, it is vanity throughout. Against the doctrine that the idea is a mere idea, figment or opinion, philosophy preserves the more profound view that nothing is real except the idea.
We do not need to be shoemakers to know if our shoes fit, and just as little have we any need to be professionals to acquire knowledge of matters of universal interest.
To be independent of public opinion is the first formal condition of achieving anything great or rational whether in life or in science.