Never lose your child's heart.
The gap between enthusiasm and indifference is filled with failures. The great man is he that does not lose his child's heart.
A great man is one who has not lost the child's heart.
When I say that all men have the mind which cannot bear to see the suffering of others, my meaning is illustrated this way: when two men suddenly see a child about to fall into a well, they all have a feeling of alarm and distress, not to gain friendship with the child's parents, nor to seek the praise of their neighbors and friends. From such a case, we see that a man without the feeling of commiseration is not a man. The feeling of commiseration is the beginning of humanity.
The man of true greatness never loses his child's heart.