Life cannot subsist in society but by reciprocal concessions.
— Samuel Johnson

The bow cannot always stand bent, nor can human frailty subsist without some lawful recreation.
Miguel de Cervantes subsist quote

A country cannot subsist well without liberty, nor liberty without virtue.
— Jean-Jacques Rousseau

Without morals a Republic can not subsist any length of time; they therfore who are decrying the Christian religion, whose morality is so sublime and pure...are undermining the solid foundation of morals, the best security for the duration of free goverments.
— Charles Carroll

It is, I fear, but a vain show of fulfilling the heathen precept, Know thyself, and too often leads to a self-estimate which will subsist in the absence of that fruit by which alone the quality of the tree is made evident.
— subsist quotation by George Eliot