The first sure symptom of a mind in health
Is rest of heart, and pleasure felt at home. [ Edward Young ]

A bodily disease which we look upon as whole and entire within itself, may, after all, be but a symptom of some ailment in the spiritual part. [ Nathaniel Hawthorne ]

There is a false gravity that is a very ill symptom: and it may be said, that as rivers, which run very slowly, have always the most mud at the bottom: so a solid stiffness in the constant course of a man's life, is a sign of a thick bed of mud at the bottom of his brain. [ Saville ]