Mules and human jackasses are proverbially stubborn.
Impossible desires are the height of unreason.
It is easier to make money than to save it. One is exertion, the other, self-denial.
Women forgive injuries, but never forget slights.
A man is never astonished that he doesn't know what another does, but he is surprised at the gross ignorance of the other in not knowing what he does.
Life ain't all beer and skittles.