No deis a vuestros alumnos lecciones verbales de ninguna clase, puesto que sólo deben recibirlas de la experiencia; tampoco - Jean-Jacques Rousseau

" The spectacle of nature, by growing quite familiar to him, becomes at last equally indifferent. It is constantly the same order, constantly the same revolutions; he has not sense enough to feel surprise at the sight of the greatest wonders; and it is not in his mind we must look for that philosophy, which man must have to know how to observe once, what he has every day seen." Jean Jacques Rousseau, On the Inequality among Mankind, Ch. 1, 20.

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.

Teach him to live rather than to avoid death: life is not breath,
but action, the use of our senses, our mind, our faculties, every
part of ourselves which makes us conscious of our being. Life
consists less in length of days than in the keen sense of living.
A man maybe buried at a hundred and may never have lived at all.
He would have fared better had he died young.