xué'ér​bù​sī​zé​wǎng, sī'ér​bù​xué​zé​dài

learning and reflection

学而不思则罔,思而不学则殆 (學而不思則罔,思而不學則殆) xué'ér​bù​sī​zé​wǎng, sī'ér​bù​xué​zé​dài
learning and reflection
To learn without thinking is confusing, to think without learning is dangerous (Confucius)

Sources

Definitions
CC-CEDICT