He had a great reputation as an orator, and is characterized by Ennius as "the quintessence of persuasiveness" (suadae medulla).
The ultimate triumph of the good spirit is an ethical demand of the religious consciousness and the quintessence of Zoroaster's religion.
No other German poet has succeeded in attuning feeling, sentiment and thought so perfectly to the music of words as he; none has expressed so fully that spirituality in which the quintessence of German lyrism lies.
Of other Indian writers mention may be made of Cridhara, the author of a Ganita-sara (" Quintessence of Calculation "), and Padmanabha, the author of an algebra.
Aristotle could not know enough, physically, about Nature to understand its matter, or its motions, or its forces; and consequently he fell into the error of supposing a primary matter with four contrary primary qualities, hot and cold, dry and moist, forming by their combinations four simple bodies, earth, water, air and fire, with natural rectilineal motions to or from the centre of the earth; to which he added a quintessence of ether composing the stars, with a natural circular motion round the earth.
Here and there there are touches of the latter, as in the portrait of Quintessence, but passion is everywhere absent - an absence for which the comic structure and plan of the book do not by any means supply a complete explanation.
But that suggestion is the central idea of the Origin of Species, and contains the quintessence of Darwinism."