Quran

Allah makes clear to His servants that satan only wants to create enmity through intoxicants along with whatever leads to it among the believers, and through gambling, where they used to gamble on wealth and family until the loser became poor and disgruntled, which led to enmity; and if it is not enmity, then hatred which could have unpredictable consequences. Ibn Atiyah: 2/234.
Question: The verse warns against things that divide the society and cause insecurity. Explain.

Intoxicants befog the mind and lead to loss of reason, which in turn leads to resentment between a person and his fellow believers, especially if that is accompanied by trading insults, which is an inevitable result of drinking intoxicants, and it may go as far as murder. In the case of gambling, when one defeats the other and takes much of his wealth for nothing in return, this is one of the greatest causes of enmity and resentment. Al-Saadi: 243.
Question: How do enmity and hatred arise among intoxicants drinkers and gamblers?

Every diversion entices people into more of it, results in enmity and hatred among those involved in it, and prevents them from remembering Allah and from performing prayer, is just as drinking intoxicants. Al-Qurtubi: 8/165.
Question: What are the signs of a prohibited diversion?

The mention of fearing Allah when consuming food is an indication that fearing Allah is a noble position. This is utmost inducement to be cautious when consuming food or drinks. The highest level of faith, "Ihsan," cannot be reached without fearing Allah. Al-Biqai: 2/539.
Question: How is consuming food related to reaching the highest level of faith, "Ihsan"?

(Then they fear Allah and do good, for Allah loves the doers of good), this proves that one who fears Allah and is a doer of good is at a higher rank than a believer who fears Allah. Al-Qurtubi: 8/172.
Question: Those who are doers of good are at a high rank. Explain in light of this verse.

(Unseen) is the opposite of the witnessed, and it is mentioned here as a praise for those who fear Allah. They are praised for their sincerity and enlightenment since they demonstrated the fear of Allah without seeing his greatness, his glory, his reward and bliss, but they have ascertained all of that through true inference. Ibn Ashur: 7/40.
Question: Why is the word (Unseen) used in this verse?

What matters is the one who fears Him unseen, when no one else is present with him. As for displaying piety and fear of Allah in front of other people, that may be because of fear of people. Al-Saadi: 244.
Question: What is the difference between fearing Allah unseen and fearing Him while in the presence of others?