Sometimes the body first submits to age, sometimes the mind; and I have seen enough who have got a weakness in their brains before either in their legs or stomach; and by how much the more it is a disease of no great pain to the sufferer, and of obscure symptoms, so much greater is the danger. For this reason it is that I complain of our laws, not that they keep us too long to our work, but that they set us to work too late. For the frailty of life considered, and to how many ordinary and natural rocks it is exposed, one ought not to give up so large a portion of it to childhood, idleness, and apprenticeship.