Understanding and deciphering »the Sign« is one of the key themes of the Koranic message. See for example: Surah II, »The Cow,« Verses 248, 252, 259, 260; Surah III, »The Family of Imran,« Verses 41, 49, 50, 58, 97, 103, 190; Surah IV, »Women,« Verse 114. It also occurs in Surahs VI, VII, VIII, X, XI, XII, XIII, XIV, XV, XVI, XVII, XVIII, XIX, XX, XXI, XXII, XXIII, XXV, XXVI, XXVII, XXVIX, XXX, XXXI, XXXII, XXXIV, XXXVI, XXXVII, XXXIX, XL, XLI, XLII, XLIII. XLIV, XLV, XLVI, XLVII, XLVIII, LI, LIII, LIV, LVII, LXXIX