"Laughing without words is a kind of growth, and pain without words is an experience." What does this sentence mean?

This sentence is very reasonable. Laughing without saying a word is a kind of growth, that is, a manifestation of growth, which shows that this person has grown up and matured, so he just laughs at some things, not comments. He feels that he is not indifferent to everyone's affairs now, but that everyone has his own cognition and three views and cannot comment on others at will. It is also an experience to say nothing about pain.