Irony is the form of paradox. Paradox is what is good and great at the same time. - Friedrich Schlegel

The most important subject, and the first problem of philosophy, is the restoration in man of the lost image of God; so far as this relates to science.
Should this restoration in the internal consciousness be fully understood, and really brought about, the object of pure philosophy is attained.

Variant translations, of the paradoxical statement which begins in German with Es ist gleich tödlich für den Geist, ein System zu haben, und keins zu haben.:

Poetry can be criticized only through poetry. A critique which itself is not a work of art, either in content as representation of the necessary impression in the process of creation, or through its beautiful form and in its liberal tone in the spirit of the old Roman satire, has no right of citizenship in the realm of art.