I have nothing against "wisdom literature" nor proverbs in particular (or even the Book of Proverbs, for that matter) — except that, you know, most proverbs can be easily bastardized to contain as much, or more, wisdom than the original.
Either wisdom — like love — is all around, or there is such a dearth of it that we're easily impressed. Your call.
While you're mulling it over, chew on these:
One good turn deserves your mother.
Familiarity breeds Yankees suck!
Don't look a gift horse before the cart.
Children speak louder than words.
Perversity makes strange bedfellows.
Necessity is a motherfucker.
Beauty is only skin deep; but ugly cuts straight to the bone.
Beware of geeks bearing gifts.
A stitch in time saves none.
A horse is not a home.
The penis mightier than the sword.
There's no such thing as a free punch.
No pain, no pain.
Paste makes waste.
Beer is thicker than water.
Better safe than curry.
The way to a man's heart is below his stomach.
Home is where the hard-on.
The best defense is a young Bobby Orr.
Misery loves glass houses.
A penny saved is planning to fail.
Ignorance carries a big stick.
The road to hell is paved with the better part of valor.
Never look a gift horse in a bowl of cherries.
Better late than an apple a day.
All's fair where angels fear to tread.
A Rolling Stone gathers no smack. Anymore.
Speak softly till the fat lady sings.