Though we may be learned by another's knowledge, we can never be wise but by our own experience.
Michel de MontaigneIt takes strong ears indeed to hear ourselves judged frankly, and because there are few who can endure criticism without being stung by it, those who venture to criticize us perform a remarkable act of friendship. For it is a healthy love that will risk wounding or offending in order to profer a benefit.
Michel de Montaigne