For many hundred's of years now the Muslim scientists have lagged behind although it is common knowledge that they were pioneers in sciences before that. What happened? Where did they go wrong? What is the Holy Qur'an's position regarding knowledge? Should we only learn religious sciences? Can we and are we encouraged by the Holy Qur'an and the sunnah to learn every knowledge that brings us closer to knowing God and his creation? What are the natural sciences that are good to be learned? What are the limitations? The present text presents in depth information and references from both the Holy Qur'an and from the sunnah on how we as a ummah should behave and what our aim should be when learning natural sciences.