失之毫厘，谬之千里。

Slight inattention can cause a great disaster.

Source: Tatoeba

Sentence Composition

=1 失 shī
  1. to lose
  2. to miss
  3. to fail
=1 失 yì
  1. alternative form of 佚 (“to ignore; indulgent”)
  2. alternative form of 逸 (yì, “to flee; to run away”)
2 之 zhī
  1. (possessive particle, literary equivalent of 的 de)
  2. him
  3. her
  4. it
3 毫厘 háolí a very small amount
4 谬 miù
  1. (bound form) false; erroneous; absurd
  2. mu (Greek letter Μ, μ)
5 之 zhī
  1. (possessive particle, literary equivalent of 的 de)
  2. him
  3. her
  4. it
6 千里 qiānlǐ
  1. a thousand miles
  2. a thousand li (i.e. 500 kilometers)
  3. a long distance