The pursuit of knowledge or skill has no end; there is always a higher level of achievement to strive for.

to be extremely terrified or shocked; literally, one's soul flies beyond the heavens

to raise one's head and look towards the heavens; (idiomatically) arrogant or haughty

Literally 'there are people beyond people and heavens beyond heavens'; used to express that no matter how talented one is, there is always someone more capable in the wider world beyond one's own circle; used to advise against complacency or arrogance.

There is always someone more talented or something more impressive than what you have seen; there is always a higher level to strive for.

visitor from outer space; extraterrestrial guest

In the wider world there are always people more talented or skies more vast than what one knows; there is always someone better than oneself.