“If you can meet with Triumph and Disaster And treat those two impostors just the same:”

3. What does he mean to treat both triumph and disaster just the same?

He means that anyone can experience one or the other but not tell the difference in the moment they're celebrating. They can always be mistaken for one another.

Explanation:

"...you can meet Triumph and Disaster...Treat those two imposters the same"

1. She expected her girls to help the other family.
she hoped her girls would do the right thing

2. They were surprised but grateful to see their visitors.

3. The mother was unable to provide for their needs.
she was sick and unable to provide

4. The children made noises like infants, as they had not yet learned to speak properly.