a professional path or the period of time spent in a particular occupation

the other end of the world or a very distant place

The most distant parts of the world; the ends of the earth.

to roam far and wide or wander to the ends of the earth, often living a nomadic life

so close, yet worlds apart

The sea of knowledge is infinite and there are no limits to what one still has to learn; often equated to the Latin phrase 'ars longa, vita brevis'.

a career spent in the army or the experience of life during wartime

feeling as close as neighbors despite being physically far apart; far-flung realms as next door

The ends of the earth

career; professional life

there are plenty more fish in the sea

Tianya, a district of Sanya City, Hainan

true friendship transcends physical distance; feeling close in spirit even when far apart

Human life is finite while the pursuit of knowledge is infinite; a famous quote from the Zhuangzi emphasizing the vastness of learning.