La única costumbre que se debe dejar que tome el niño, es el de no contraer ninguno. - Jean-Jacques Rousseau

Las óperas de Rameau empezaban a meter ruido y dieron a conocer sus obras teóricas, que, habiendo permanecido ignoradas, poseían muy pocos. Por casualidad oí hablar de su Tratado de la armonía,

Man is born free, and everywhere he is in chains. Here's one who thinks he is the master of others, yet he is more enslaved than they are.

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.