Duty (n.) is necessarily tendentious — A nation goes to pieces when it confounds its duty with the general concept of duty.
Duty (n.) is a compulsive feeling we refuse to discuss; the thinker, finding everything evolved and discussable, is a man without a sense of duty — even toward truth, yet duty may be the very fuel his machine runs on.
Duty (n.) is the rights of others over us — and we do it out of pride, restoring our self-regard by repaying those who impinged on our sphere of power.
Duty (n.) declared unconditional, is the pompous principle needed by those who must be someone's instrument yet feel their dignity forbids it.
Duty (n.) is a great dragon named "Thou shalt," every scale gleaming with the values of millennia; against it the lion says "I will."
Duty (n.) in itself — reverence for everything disagreeable — is the mechanical form of existence worshiping itself; type: Kant, fanatic of "thou shalt."