“Nothing can destroy iron, only its own rust can. Likewise, nothing can destroy you, only your own mindset can.”
Related quotes

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 36.

“For nothing can be greater than seduction itself, not even the order that destroys it.”
Seduction (1990)
1990s
Essays on Liberty (1954), Essays on Liberty https://books.google.com/books?id=SugpAQAAMAAJ&dq=There+is+really+nothing+that+can+be+done+except+by+an+individual.+Only+individuals+can+learn.+Only+individuals+can+think+creatively.+Only+individuals+can+cooperate.+Only+individuals+can+combat+statism.&focus=searchwithinvolume&q=%22There+is+really+nothing+that+can+be+done+except+by+an+individual.+Only+individuals+can+learn.+Only+individuals+can+think+creatively.+Only+individuals+can+cooperate.+Only+individuals+can+combat+statism.%22