has / have ?

Leaving aside the strangeness of the sentence, there is a parenthetical in there that has not been properly set off with commas: "Human endeavor, like outward property and money, has been to me contemptible ." A parenthetical stands outside the sentence and does not come into play when deciding the sentence grammar: "I, plus Jeff and Gary, am climbing to the summit today."

Thank you .
"Outward property and money has been to me contemptible ." Is this correct ?

outrageousThank you . "Outward property and money has been to me contemptible ." Is this correct ?

No. You have a compound subject, two things, plural—property and money. "Outward property" is odd, by the way.

Actually the original text is "outward success "
Human endeavor , like outward success and money , has always seemed to me