The civilisation of ancient Greece was nurtured within city
walls. In fact, all the modern civilisations have their cradles
of brick and mortar.

These walls leave their mark deep in the minds of men. They set
up a principle of “divide and rule” in our mental outlook, which
begets in us a habit of securing all our conquests by fortifying
them and separating them from one another. We divide nation and
nation, knowledge and knowledge, man and nature. It breeds in us
a strong suspicion of whatever is beyond the barriers we have
built, and everything has to fight hard for its entrance into our
recognition.

When the first Aryan invaders appeared in India it was a vast
land of forests, and the new-comers rapidly took advantage of
them. These forests afforded them shelter from the fierce heat
of the sun and the ravages of tropical storms, pastures for
cattle, fuel for sacrificial fire, and materials for building
cottages. And the different Aryan clans with their patriarchal
heads settled in the different forest tracts which had some
special advantage of natural protection, and food and water in
plenty.

Thus in India it was in the forests that our civilisation had its
birth, and it took a distinct character from this origin and
environment. It was surrounded by the vast life of nature, was
fed and clothed by her, and had the closest and most constant
intercourse with her varying aspects.

Such a life, it may be thought, tends to have the effect of
dulling human intelligence and dwarfing the incentives to
progress by lowering the standards of existence. But in ancient
India we find that the circumstances of forest life did not
overcome man’s mind, and did not enfeeble the current of his
energies, but only gave to it a particular direction. Having
been in constant contact with the living growth of nature, his
mind was free from the desire to extend his dominion by erecting
boundary walls around his acquisitions. His aim was not to
acquire but to realise, to enlarge his consciousness by growing
with and growing into his surroundings. He felt that truth is
all-comprehensive, that there is no such thing as absolute
isolation in existence, and the only way of attaining truth is
through the interpenetration of our being into all objects. To
realise this great harmony between man’s spirit and the spirit of
the world was the endeavour of the forest-dwelling sages of
ancient India.