Surah 26. Ash-Shuara, Ayah 88

Now we have a vision of the Day of Judgment. Nothing will then avail except a pure heart; all sorts of the so-called "good deeds" of this world, without the motive of purity, will be useless. The contrast of the Garden of Bliss with the Fire of Misery will be plainly visible. Evil will be shown in its true colours,-isolated, helpless, cursing and despairing; and all chances will then have been lost.