Three Types of Fasting

There are three types of fasting

One is of the average Muslim (one who submits to the Will of Allah Almighty), he fasts only from food, drink, and marital relations. 

The second is the fasting of the Mu'min (believer) - he fasts from everything that is forbidden - bad language, bad thoughts, looking at bad things & listening to bad things etc. 

The third and most supreme type of fasting is that of the Muhsin (one who has perfected his faith in Allah Almighty) - and this is fasting from everything other than Allah subhanahu wa ta'ala. To such a person, a Knower of Allah subhanahu wa ta'ala, nothing in the world exists besides Allah. Wherever he looks, he sees Allah swt, whenever he thinks, he thinks of Allah subhanahu wa ta'ala!

[Imam Ghazali]

Quran-e-Pak : There is no Deity Except ALLAH

ALLAH (سُبْحَانَهُ وَتَعَالَى), there is no deity except Him, the Ever-Living, the Sustainer of [all] existence. Neither drowsiness overtakes Him nor sleep. To Him belongs whatever is in the heavens and whatever is on the earth. Who is it that can intercede with Him except by His permission? He knows what is [presently] before them and what will be after them, and they encompass not a thing of His knowledge except for what He wills. His Kursi extends over the heavens and the earth, and their preservation tires Him not. And He is the Most High, the Most Great.

[Qur'an 2:255]