Mules and human jackasses are proverbially stubborn.
Look not to a woman's head for her brains, but rather to her heart.
Hurry is only admissible in catching flies.
Hope is a pleasant acquaintance, but an unsafe friend, not the man for your banker, though he may do for a traveling companion.
No one is rich whose expenditures exceed his means, and no one is poor whose incomings exceed his outgoings.
Death and taxes are inevitable.