In this era, the skies have been proven to be non-existent; now what can I say as to how far my sigh reaches?

In classical poetry, a lover's heartfelt sigh was believed to pierce the solid ceiling of the nine heavens. But here, the poet brings in a touch of modern discovery: the skies have been proven to be nothing more than an endless, empty void. With no celestial boundary left to stop it, he wonders with tender melancholy just how far into infinity his boundless grief will travel.