Tafseer

The meaing of Istiwa' in the Qur'an

Q: Please can you explain the 19 meanings of istawah in the Quran according to the muffasirun like abu jafar at tabari, ibn kathir and other great mufassirs, with qoutations will be apprecied. 

[Al-Baqara : 2 : 29, Al-A'râf : 7 : 54, Yûnus : 10 : 3, Hud  11 : 44, Al-Ra'd : 13 : 2, Tâ. Hâ : 20 : 5, Al-Mu'minûn : 23 : 28, Al-Furqân: 25 : 59, Al-Qasas : 28 : 14, Al-Sajda : 32 : 4, Fussilat  41 : 11, Al-Zukhruf : 43 : 13, Al-Fath : 48 : 29,Al-Najm : 53 : 6,Al-Hadîd : 57 : 4 ]

Taking one's naffs as one's ilaah

Q: My question is about an ayat in a quran that says, "those who take there nuffs as there illah". What does this ayat mean? 

Can it be possible that  a person goes to his wife, and be worshipping his nuffs even though he goes to his wife and has intercourse in a  way allowed in shariah. What if he is behaving like an animal or acts upon his animal qualities. Is this allowed in sharia? I am not married yet but I am afraid to get married because of tasswuf and wazifahs and the effects they have upon me.