It will be a considerable sacrifice for all of us.

But when my country has need of me, you will feel that I cannot honorably stay at home.

As for Frank, he may regard me as his substitute." "My substitute!" repeated Frank, in a questioning tone.
"Yes, since but for you, taking charge of the farm in my absence, I should not feel that I could go." Frank looked pleased.

It made him feel that he was really of some importance.

Boys, unless they are incorrigibly idle, are glad to be placed in posts of responsibility.