“As long as the world shall last, there will be wrongs, and if no man objected and no man rebelled, those wrongs would last forever.”

Source: The Last Castle (1966), Chapter 2, section 1

VII, 22
Meditations (c. 121–180 AD), Book VII

The Rubaiyat (1120)

Source: The Seth Material (1970), p. 274
Context: It is wrong to curse a flower and wrong to curse a man. It is wrong not to hold any man in honor, and it is wrong to ridicule any man. You must honor yourselves and see within yourselves the spirit of eternal vitality. If you do not do this, then you destroy what you touch. And you must honor each other individual also, because in him is the spark of eternal vitality. When you curse another, you curse yourselves, and the curse returns to you. When you are violent, the violence returns... I speak to you because yours is the opportunity [to better world conditions] and yours is the time. Do not fall into the old ways that will lead you precisely into the world that you fear.

Source Book in Ancient Philosophy (1907), The Golden Sayings of Democritus

Variant: The last act is the greatest treason. To do the right deed for the wrong reason.
Source: Murder in the Cathedral

Variant: For the majority of people, though they do not know what to do with this life, long for another that shall have no end.
Source: The Revolt of the Angels (1914), Ch. XXI