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

No hay derecho a matar al enemigo sino en el caso de no poderle hacer esclavo. Luego, el derecho de hacerle esclavo no viene del derecho de matarle. Por lo tanto, es un cambio inicuo hacerle comprar a costa de su libertad una vida sobre la cual nadie tiene derecho.

Self-love, which concerns itself only with ourselves, is content to satisfy our own needs; but selfishness, which is always comparing self with others, is never satisfied and never can be; for this feeling, which prefers ourselves to others, requires that they should prefer us to themselves, which is impossible. Thus the tender and gentle passions spring from self-love, while the hateful and angry passions spring from selfishness. So it is the fewness of his needs, the narrow limits within which he can compare himself with others, that makes a man really good; what makes him really bad is a multiplicity of needs and dependence on the opinions of others.

To live is not to breathe but to act. It is to make use of our organs, our senses, our faculties, of all the parts of ourselves which give us the sentiment of our existence. The man who has lived the most is not he who has counted the most years but he who has most felt life.