Abundance of knowledge does not teach men to be wise.
Dogs bark at a person whom they do not know.
Good character is not formed in a week or a month. It is created little by little, day by day. Protracted and patient effort is needed to develop good character.
It is by disease that health is pleasant; by evil that good is pleasant; by hunger, satiety; by weariness, rest.
Those who love wisdom must investigate many things
All things flow, nothing abides.