Paragraph 1, Zeile 126 Epistulae Morales Ad Lucilium: Epistulae Morales, Liber XIV & XV von Seneca Seneca Abschnitt XC. Seneca Lvcilio Suo Salutem, Paragraph 7, Zeile 46 Quaestiones Naturales IV von Seneca Seneca Paragraph 1, Zeile 5