身教勝於言教

身教胜于言教
shēnjiàoshèngyúyánjiào
  1. teaching by example beats explaining in words (idiom)
  2. action speaks louder than words

CEDICT

Entry Composition

1 身教 shēnjiào to teach by example
2 勝於 shèngyú to be better than; to be superior to
3 言教 yánjiào to give verbal instruction