The word sanity refers to rationality of the mind. A person who is reasonable, rational and mentally sound is a sane person. The mental ability to think and reason is what distinguishes a sane person from an insane one. To possess a sound body and a sound mind, you need to be rational and sensible. In this world of chaos and madness, its sanity that helps one to glide through tougher circumstances. Read these famous sanity quotations and sayings to delve deeper into the importance of sanity.