The real duty of man is not to extend his power or multiply his wealth beyond his needs, but to enrich and enjoy his imperishable possession: his soul.
To keep the body in good health is a duty... otherwise we shall not be able to keep our mind strong and clear.
The dead cannot cry out for justice. It is a duty of the living to do so for them.
We, the People, recognize that we have responsibilities as well as rights; that our destinies are bound together; that a freedom which only asks what's in it for me, a freedom without a commitment to others, a freedom without love or charity or duty or patriotism, is unworthy of our founding ideals, and those who died in their defense.
Children need to get a high-quality education, avoid violence and the criminal-justice system, and gain jobs. But they deserve more. We want them to learn not only reading and math but fairness, caring, self-respect, family commitment, and civic duty.
All great things are simple, and many can be expressed in single words: freedom, justice, honor, duty, mercy, hope.
Do something every day that you don't want to do; this is the golden rule for acquiring the habit of doing your duty without pain.
What Heaven has conferred is called The Nature; an accordance with this nature is called The Path of duty; the regulation of this path is called Instruction. The path may not be left for an instant. If it could be left, it would not be the path.