What do you mean by origin and extinction, origin and extinction, and shallow feelings?

"Fate begins and ends, and fate is free", which means that people can't grasp the beginning and end of fate, and fate is free. People who have a heart can always meet the right person at the right time.

"Too deep feelings for others" means that the depth of feelings is determined by your own inner feelings, not by others.

Generally speaking, this sentence expresses the unpredictability and uncontrollability of fate and feelings, as well as the personal sense of powerlessness and helplessness in the face of these.