Stoic philosopher saw clearly, and declared emphatically, 
that increases in knowledge must be expected in the future. 
"There are many peoples to-day," Seneca wrote, "who are ignorant of 
the cause of eclipses of the moon, and it has only recently been 
demonstrated among ourselves. The day will come when time and 
human diligence will clear up problems which are now obscure. We 
divide the few years of our lives unequally between study and vice, and 
it will therefore be the work of many generations to explain such 
phenomena as comets. One day our posterity will marvel at our 
ignorance of causes so clear to them. 
"How many new animals have we first come to know in the present age? 
In time to come men will know much that is unknown to us. Many 
discoveries are reserved for future ages, when our memory will have 
faded from men's minds. We imagine ourselves initiated in the secrets 
of nature; we are standing on the threshold of her temple." 
[Footnote: The quotations from Seneca will be found in Naturales 
Quaestiones, vii. 25 and 31. See also Epist. 64. Seneca implies 
continuity in scientific research. Aristotle had stated this expressly, 
pointing out that we are indebted not only to the author of the 
philosophical theory which we accept as true, but also to the 
predecessors whose views it has superseded (Metaphysics, i. ii. chap. 1). 
But he seems to consider his own system as final.] 
But these predictions are far from showing that Seneca had the least 
inkling of a doctrine of the Progress of humanity. Such a doctrine is 
sharply excluded by the principles of his philosophy and his profoundly 
pessimistic view of human affairs. Immediately after the passage which 
I have quoted he goes on to enlarge on the progress of vice. "Are you 
surprised to be told that human knowledge has not yet completed its 
whole task? Why, human wickedness has not yet fully developed." 
Yet, at least, it may be said, Seneca believed in a progress of 
knowledge and recognised its value. Yes, but the value which he
attributed to it did not lie in any advantages which it would bring to the 
general community of mankind. He did not expect from it any 
improvement of the world. The value of natural science, from his point 
of view, was this, that it opened to the philosopher a divine region, in 
which, "wandering among the stars," he could laugh at the earth and all 
its riches, and his mind "delivered as it were from prison could return to 
its original home." In other words, its value lay not in its results, but 
simply in the intellectual activity; and therefore it concerned not 
mankind at large but a few chosen individuals who, doomed to live in a 
miserable world, could thus deliver their souls from slavery. 
For Seneca's belief in the theory of degeneration and the hopeless 
corruption of the race is uncompromising. Human life on the earth is 
periodically destroyed, alternately by fire and flood; and each period 
begins with a golden age in which men live in rude simplicity, innocent 
because they are ignorant not because they are wise. When they 
degenerate from this state, arts and inventions promote deterioration by 
ministering to luxury and vice. 
Interesting, then, as Seneca's observations on the prospect of some 
future scientific discoveries are, and they are unique in ancient 
literature, [Footnote: They are general and definite. This distinguishes 
them, for instance, from Plato's incidental hint in the Republic as to the 
prospect of the future development of solid geometry.] they were far 
from adumbrating a doctrine of the Progress of man. For him, as for 
Plato and the older philosophers, time is the enemy of man. [Footnote: 
The quotations and the references here will be found in Nat. Quaest. i. 
Praef.; Epist. 104, Sec. 16 (cp. 110, Sec. 8; 117, Sec. 20, and the fine 
passage in 65, Sec. 16-21); Nat. Quaest. iii. 28-30; and finally Epist. 90, 
Sec. 45, cp. Sec. 17. This last letter is a criticism on Posidonius, who 
asserted that the arts invented in primitive times were due to 
philosophers. Seneca repudiates this view: omnia enim ista sagacitas 
hominum, non sapientia inuenit. 
Seneca touches on the possibility of the discovery of new lands beyond 
the ocean in a passage in his Medea (374 sqq.) which has been often 
quoted: 
uenient annis secula seris, quibus oceanus uincula rerum laxet et ingens 
pateat tellus Tiphysque novos detegat orbes, ... nec sit terris ultima 
Thule.]
4. 
There was however a school of philosophical speculation, which might 
have led to the foundation of a theory of Progress, if the historical 
outlook of the Greeks had been larger and if their temper had been 
different. The Atomic theory of Democritus seems to us now, in many    
    
		
	
	
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