心有餘而力不足 [ㄒㄧㄣ ㄧㄡˇ ㄩˊ ㄦˊ ㄌㄧˋ ㄅㄨˋ ㄗㄨˊ; xin1 you3 yu2 er2 li4 bu4 zu2]
The will is there, but not the strength (idiom, from Confucian Analects).
I really want to do it, but don't have the resources.
The spirit is willing but the flesh is weak.
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