Surah 32. As-Sajdah, Ayah 17

Lit., "what is kept hidden for them [by way] of a joy of the eyes", i.e., of blissful delights, irrespective of whether seen, heard or felt. The expression "what is kept hidden for them" clearly alludes to the unknowable - and, therefore, only allegorically describable - quality of life in the hereafter. The impossibility of man's really "imagining" paradise has been summed up by the Prophet in the well-authenticated hadith: "God says: 'I have readied for My righteous servants what no eye has ever seen, and no ear has ever heard, and no heart of man has ever conceived'" (Bukhari and Muslim, on the authority of Abu Hurayrah; also Tirmidhi). This hadith has always been regarded by the Companions as the Prophet's own comment on the above verse (cf. Fath al-Bari VIII, 418 f.).

Delights of the eye: an idiom for that which pleases most and gives most satisfaction. In our present state we can scarcely imagine the real Bliss that will come to us in the Future.