There once was an island on top of a tree
On top of the island lived a man not free
Down could his eye embrace the whole world
But when he looked up still he felt so small
Old Banzaist tongue twister
(1138 a. C., transl. Kurtwood Sallinger)
Strictly speaking in terms of time, we only know for sure that we are here now. For all we know, the past could all be a ludicrous invention, crafted for the entertainment of some mischievous individual.
The time of now may be described as the 'observable universe'. 'The observable universe' is an expression invented by scientists for the christening of the farthest regions of the cosmos measurable by man.
When explained to Banzaists, the concept of the 'observable universe' is regarded as a practical joke. Banzaists know of the time and space that was, is and shall be.
The Banzaist tongue twister quoted above is therefore a true riddle for European scholars. The confused man described in the rhyme is certainly not a Banzaist.
Countless interpretational theories have been suggested. One of the most controversial thesis states that the 'man' in question is in fact the Westerner man, trapped between his urge to rule earthly affairs, and his ignorance concerning the universe.
That the saying in question pre-dates by three centuries the arrival of Portuguese sailors to the coast of Brazil, is a striking fact that could prove that natives had known of the Western world for centuries, way before the Western world knew of them.