Without X (Cannot Do Without)

2 related grammar points that express the same core idea - compared below so you can tell which one to reach for.

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なくして〜はない / なしでは〜ない

A practical dependency rather than a conceptual one.

vs : Use なしでは for things you actually need to hand (眼鏡なしでは読めない). なくして is abstract and rhetorical (努力なくして成功はない), so applying it to glasses sounds like a slogan.