Precepts or maxims are of great weight; and a few useful ones on hand do more to produce a happy life than the volumes we can't find.Lucius Annaeus Seneca
Look not at what is contrary to propriety; listen not to what is contrary to propriety; speak not what is contrary to propriety; make no movement which is contrary to propriety.Confucius
Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment.Buddha