No Matter How Much You Know

The great scholar, Shaikh Ṣāliḥ Al-Fawzān, may Allāh protect him, said:

No person should be deceived by [how much] knowledge he has because what he doesn’t know is more than what he knows.

Sharḥ Al-Durrah Al-Maḍiyyah, p. 277, as quoted by Ibrāhīm Al-Sinighālī.