Two great statements concerning knowledge:
Abdullah ibn 'Abbaas said:
"Studying knowledge a portion of the night is more beloved to me than spending a portion of it in worship."
(Musanaf Abdur Razzaq 11/253)
Imam az-Zuhri said:
"Allah is not worshipped with anything greater than knowledge."
(Al Bidayah wal Nihayah 9/345)