Tazkiyah, according to the Quran, is based on the mind and not on the heart. The word ‘heart’ is used in the Quran and the Hadith in the literary sense and not in the physical sense. In later times, Muslims came under the influence of the Sufis. According to this concept, it came to be accepted that the human heart was the treasure house of all divine realities. It was believed that one could reach this treasure house through meditation. But this concept of heart-based tazkiya was not derived from the Quran but from history. Modern science has provided the scientific foundation by which Islamic tzkiyah can once again be revived. The heart has no capacity to think. All human actions come into existence through thinking and the way to attain tazciyah is no exception. Tazkiiyah is achieved at the level of the mind, rather than through any strivings at thelevel of the heart, says Maulana Wahiduddin Khan.