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"Allaah is the Light of the heavens and the earth, The parable of His Light is as (if there were) a niche and within it a lamp, the lamp is in glass, the glass as it were a brilliant star, lit from a blessed tree, an olive, neither of the east (i.e, neither it gets sun-rays only in the morning) nor of the west (i.e, nor it gets sun- rays only in the afternoon, but it is exposed to the sun all day long), whose oil would almost glow forth (of itself), though no fire touched it, Light upon Light! Allaah guides to His Light whom He wills, And Allaah sets forth parables for mankind, and Allaah is All-Knower of everything." [An-Noor (24):35]

Narrated Anas:

The Prophet said, "Whoever possesses the following three qualities will have the sweetness (delight) of faith:

1. The one to whom Allah and His Apostle becomes dearer than anything else.
2. Who loves a person and he loves him only for Allah's sake.
3. Who hates to revert to Atheism (disbelief) as he hates to be thrown into the fire."

[The Book of Faith Volume 1, Book 2, Hadeeth 15]