Question

Explain “to laugh with their hearts​

Answer 1

Answer:

Laughing with one's heart reveals real gladness while laughing with one's teeth reveals one's external showy love.

Explanation:

Answer 2

Laughing with heart is the genuine expression of happiness and harmony. ... The poet is sad that he belongs to a fake society, fake expressions and smile. He doesn't want his son to have this hollowness of the society. So he addresses his poem to his son, in the poem.