| Link | Quote | Stars | Tags | Author |
| d8b7ab2 | The substratum of mental activity must be sought only in ponderable matter. | Bernhard Riemann | ||
| 112cb27 | The souls of perished creatures shall... form the elements of the soul-life of the earth. | Bernhard Riemann | ||
| 6685bc5 | I. Thesis. Finite elements of Space and Time. Antithesis. Continuity. | Bernhard Riemann |