Q 39: What is the textual proof that degrees of Faith vary from one person to another?

{And those foremost [in the life of this world on the very first call for to embrace Islam] will be foremost (in Paradise). These will be the nearest (to Allah). In the Gardens of Delight. A multitude of those (foremost) will be from the first generations (who embraced Islam). And a few of those (foremost) will be from the later generations. (They will be) on thrones woven with gold and precious stones. Reclining thereon, face to face. Immortal boys will go around them (serving), with cups, and jugs, and a glass of flowing wine, wherefrom they will get neither any aching of the head, nor any intoxication. And with fruit that they may choose, and with the flesh of fowls that they desire. And (there will be) Hur (fair females) with wide, lovely eyes (as wives for the pious), like unto preserved pearls. A reward for what they used to do. No Laghw (dirty, false, evil vain talk) will they hear therein, not any sinful speech (like backbiting). But only the saying of: Salam! Salam! (greetings with peace)! And those on the Right Hand –how (fortunate) will be those on the Right Hand?}.

{Then, If he (the dying person) be of the Muqarrabun those brought near to Allah), (there is for him) rest and provision, and a Garden of Delights (Paradise). And if he (the dying person) be of those on the Right Hand, then there is safety and peace (from the Punishment of Allah) for those on the right Hand}.

{Then of them are some who wrong their own selves, and of them are some who follow a middle course, and of them are some who are, by Allah's Leave, foremost in good deeds. That (inheritance of the Qur'an) that is indeed a great grace}.