Excuse me, what is the specific meaning of the sentence "if I meet you again in the afterlife, I will be with you again"?

if I can see you again in my next life, I will still love you.

This has something to do with Zhuo Wenjun and Sima Xiangru, because Sima Xiangru touched the beauty's heart with a song "Phoenix Begging for the Phoenix" at the banquet, and later eloped with Zhuo Wenjun. In ancient times, seeking the phoenix is a courtship song.