Imam Sadiq (a.s) said: “There are three groups of students, and they can be distinguished as follows: 1- Some students seek knowledge as a weapon for ignorance and for fighting. 2- Some students seek knowledge to fool others and to get ahead. 3- Some students seek knowledge because they want to learn and understand. The first group are quarrelsome ones, and start to talk in gatherings and talk about science, and praise patience, and fake humbleness but are void of piety. God has squashed their noses and cut their backs. The second group are tricky and flattering. They act to be higher up than their equals in rank, and they belittle themselves for the rich people. They will respect the rich, and disobey their own religious beliefs. Therefore God has made them blind, and eliminated their products from among those of the scientists. The third group who want to understand are sad and stay up at night. They leave their beds and stand up in the dark of the night. They act with fear, worry and want. They are busy with themselves, and really know how the people are. They are even afraid of their most trustworthy brothers. Therefore God will establish them firmly, and will grant them immunity in the Hereafter.”