As a rule, until they are old men and women, they do not forget the undeserved blow, the unprovoked sarcasm.

We many times receive patiently, as grown men and women, reminders that we are doing wrong, but we find it hard to pardon the person who accuses us falsely.
The most powerful auxiliary love can have in accomplishing its end is tact.

Some people have more than others, but at all times it may be cultivated.

Perhaps the best rule by which to learn it is the old one of "Put yourself in his place." Reverse the positions as in Anstey's "Vice Versa," and imagine yourself a hot-headed, sore-hearted, prejudiced child, with a step-mother against whom your mind has been poisoned by those older and presumably wiser than yourself.

How would you receive this or that correction?
Acquire the habit of thus putting the matter before your mind's eye, and you will soon find that tactful patience becomes second nature.
If you can possibly avoid it, do not correct the children in the presence of other people, or complain to their father of them.