His study and wisdom made all to be his debtors.

But he bought his wisdom with thirty years of health and happiness.

We are rich only because the young scholar, with his glorious future, for our sakes made himself poor.
Our social treasure also is the result of vicarious service and suffering.

Sailing along the New England coasts, one man's craft strikes a rock and goes to the bottom.

But where his boat sank there the state lifts a danger signal, and henceforth, avoiding that rock, whole fleets are saved.