We are all born ignorant, but one must work hard to remain stupid.

No duty is more urgent than that of returning thanks.

The first duty of society is justice.

Do your duty, and leave the rest to Providence.

Duty is the essence of morality.

The duty of every citizen is to question authority.

Do your duty, and leave the rest to heaven.

No man has a right to do what he pleases, except when he pleases to do right.

The duty of youth is to challenge corruption.

Duty is the stern daughter of the voice of God.

The first duty of a man is the seeking after and the investigation of truth.

The first duty of love is to listen.

Duty makes us do things well, but love makes us do them beautifully.

The duty of a leader is to inspire and guide those around him.

The only way to do your work is to love what you do.

Duty is the most sublime word in the English language.

Duty is heavier than a mountain, death lighter than a feather.

Duty is what one expects from others.

The reward of a thing well done is to have done it.