学而不思则罔，思而不学则殆

學而不思則罔，思而不學則殆
xuéérbùsīzéwǎng,sīérbùxuézédài
To learn without thinking is confusing, to think without learning is dangerous (Confucius)

CEDICT

Entry Composition

1 学 xué
  1. to learn
  2. to study
  3. to imitate
  4. science
  5. -ology
2 而 ér
  1. and
  2. as well as
  3. and so
  4. but (not)
  5. yet (not)
  6. (indicates causal relation)
  7. (indicates change of state)
  8. (indicates contrast)
3 不 bù
  1. no; not so
  2. (bound form) not; un-
4 思 sī
  1. to think
  2. to consider
5 则 zé
  1. (literary) (conjunction used to express contrast with a previous clause) but; then
  2. (bound form) standard; norm
  3. (bound form) principle
  4. (literary) to imitate; to follow
  5. classifier for written items
=6 罔 wǎng old variant of 罔 wǎng
=6 罔 wǎng
  1. to deceive
  2. there is none
  3. old variant of 网 wǎng
7 思 sī
  1. to think
  2. to consider
8 而 ér
  1. and
  2. as well as
  3. and so
  4. but (not)
  5. yet (not)
  6. (indicates causal relation)
  7. (indicates change of state)
  8. (indicates contrast)
9 不 bù
  1. no; not so
  2. (bound form) not; un-
10 学 xué
  1. to learn
  2. to study
  3. to imitate
  4. science
  5. -ology
11 则 zé
  1. (literary) (conjunction used to express contrast with a previous clause) but; then
  2. (bound form) standard; norm
  3. (bound form) principle
  4. (literary) to imitate; to follow
  5. classifier for written items
12 殆 dài
  1. (literary) dangerous; perilous
  2. (literary) almost; well-nigh