The last pleasure in life is the sense of discharging our duty.

God obligeth no man to more than he hath given him ability to perform.

God never imposes a duty without giving time to do it.

What is the use of such terrible diligence as many tire themselves out with, if they always postpone their exchange of smiles with Beauty and Joy to cling to irksome duties and relations?

Rich men are to bear the infirmities of the poor. Wise men are to bear the mistakes of the ignorant.

Nobody is bound by any obligation unless it has first been freely accepted.

In practice it is seldom very hard to do one's duty when one knows what it is, but it is sometimes exceedingly difficult to find this out.

Do your duty, and leave the rest to the gods.

Must's a schoolroom in the month of may

You will always find those who think they know what is your duty better than you know it.