Jihad is obligatory for the Muslims.
If an ignorant person is attracted by the things of the world, that is bad. But if a learned person is thus attracted, it is worse.
Without knowledge action is useless and knowledge without action is futile.
Do not follow vain desires; for verily he who prospers is preserved from lust, greed and anger.
It is bad for a young man to sin; but it is worse for an old man to sin.
The more knowledge you have, the greater will be your fear of Allah.