that the Egyptian priests 
looked on the Greeks as children who failed to understand the great 
mysteries involved in their religious rites, disguised as they were in 
symbolic form. But, besides their indebtedness to Egypt, we will find 
that they also owed much to Persia, and through it again to Indian 
sources of knowledge. 
There was constant communication between the Grecian and Persian 
nations. We learn that it was not uncommon for Grecian generals to 
take service under the Persian Satraps, tempted by the liberal 
recompence with which their services were rewarded. About the year 
356 B.C. this system of Greeks accepting service under Persian Satraps 
nearly caused the outbreak of war between Greece and Persia--Chares, 
a Grecian commander, having assisted with his fleet and men, 
Artabanus, the Satrap of Propontis, who was then in revolt against the 
Persian king. But before this, during the great plague which desolated 
Athens in 430 B.C., and which also extended to Persia, Hippocrates 
was invited to go to the Persian Court; and it is on record that Ctesias
was for seventeen years physician at the Persian Court about 400 B.C., 
during which period he wrote his history of Persia, and an account of 
India, which Professor Wilson, in a paper read to the Ashmolean 
Society of Oxford, has shown to contain notices of the natural 
productions of the country, "which, although often extravagant and 
absurd, are, nevertheless, founded on truth." 
There were, too, Grecian soldiers employed as paid auxiliaries, and a 
colony of Greeks who had been taken prisoners of war was founded 
within a day's journey of Susa. 
The great expedition to Persia, and the graphic description of the retreat 
of the "ten thousand" Greeks, given by Xenophon in his Anabasis, must 
have been well known to Alexander the Great when he set out on his 
career of conquest. He overthrew the Persian empire in 331 B.C., 
having destroyed Tyre and subdued Egypt in the previous year and 
carried his triumphant progress to the banks of the Indus, and there he 
"held intercourse with the learned sages of India." On Alexander's 
death Seleucus succeeded to the throne of Persia in 307 B.C., and not 
long after he forced his way beyond the Indus, and ultimately as far as 
the sacred river Ganges. He formed an alliance with the Indian king 
Sandrocottus (otherwise known as Chandra-gupta), which was 
maintained for many years, and it is said, also, that he gave his 
daughter in marriage to the Indian king, and aided him with Grecian 
auxiliaries in his wars. 
He sent an expedition by sea, under the command of Patrocles his 
admiral, who visited the western shores of India, and a little later he 
despatched an embassy under Megasthenes and Onesicrates, the former 
of whom resided for some years at the "great city" of Palibothra 
(supposed to be Patna). 
Not long after Megasthenes was at Palibothra, Ptolemy Philadelphus 
sent an expedition overland through Persia to India, and later Ptolemy 
Euergetes, who lived between 145-116 B.C., sent a fleet under 
Eudoxius on a voyage of discovery to the western shores of India, 
piloted, as is said, by an Indian sailor who had been shipwrecked, and 
who had been found in a boat on the Red Sea. Eudoxius reached India
safely, and returned to Egypt with a cargo of spices and precious 
stones. 
The proof of very ancient communication between Greece and India is 
quite clear, both by way of Persia and Egypt, and we find that the 
Greeks, who were in the habit of calling all other nations barbarians, 
speak constantly with respect of the gymnosophists--called "Sapientes 
Indi" by Pliny. We read also of the Greek philosophers constantly 
travelling eastward in search of knowledge, and on their return setting 
up new schools of thought. Thales, it is affirmed, travelled in Egypt and 
Asia during the sixth century B.C., and it is said of him that he returned 
to Miletus, and transported that vast stock of learning which he had 
acquired into his own country. 
He is generally considered as the first of the Greek philosophers. Strabo 
says of him that he was the first of the Grecian philosophers who made 
inquiry into natural causes and the mathematics. 
The doctrine of Thales, that water was the first elementary principle, is 
exactly that of the ancient Hindoos, who held that water was the first 
element, and the first work of the creative power. This idea was not 
completely exploded even up till the 18th century. We find Van 
Helmont affirming that all metals, and even rocks, may be resolved into 
water; and Lavoisier, so lately as 1770, thought it worth while to 
communicate an elaborate paper "On the nature of water and the 
experiments by which it has been attempted to prove the possibility of 
converting it into earth." 
Pythagoras,    
    
		
	
	
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