“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"

ich statement best shows a problem in travels with charley?

one sharp difficulty presented itself. in the intervening twenty-five years my name had become reasonably well known.

this being so, my trip demanded that i leave my name and my identity at home.

i had to go alone and i had to be self-contained, a kind of casual turtle carrying his house on his back.

with all this in mind i wrote to the head office of a great corporation which manufactures trucks.