"Read - In the name of thy Lord Who creates, Creates man from a clot. Read - And thy Lord is the Most Bounteous, Who teaches by the pen, Teaches man that which he knew not." [Surah al-Alaq:1-5]
[Source: Courtesy of Islamic Media]
The difference between the 'abd and the 'aleem is that the former can easily be tricked by Syaitan. Indeed, the road to paradise is the road of knowledge ('Ilm). View also this video, which outlines the ni'mah of the 'aql - The Position and Role of the Mind in Islam.
Afternote: Truly, Allah SWT rewards those who seek and gain knowledge, subhan Allah!