瞎子摸象 [ㄒㄧㄚ ˙ㄗ ㄇㄛ ㄒㄧㄤˋ; xia1 zi5 mo1 xiang4]
  blind people touch an elephant (idiom, from Nirvana sutra 大般涅槃經[ㄉㄚˋ ㄅㄢ ㄋㄧㄝˋ ㄆㄢˊ ㄐㄧㄥ; da4 ban1 nie4 pan2 jing1]); fig. unable to see the big picture
  to mistake the part for the whole
  unable to see the wood for the trees
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