The Difference Between Islam and Secularism.

According to Mufti Taqi Usmani :
The Basic Difference between Islam and secularism is that Islam recommends the use of intellect strictly within its jurisdiction and not beyond that.If it is pressed into service beyond that not only will it not work but it will also begin to furnish wrong answers.If you operate a computer to tell you something which has not been fed into it ,not will it will work but it will give wrong and misleading results.In the same way the computer of the human intellect will give either no reply or misleading reply about something which has not been fed into it and that something is indeed the information that is preserved in the divine Revelation.It will be absurd to utilise the intellect and expect from it information which can be obtained form the Divine Relevation.That is why Almighty Allah sent to this world from time to time.His Prophets and Messengers with Divine Scriptures,the last of them being the Holy Prophet Muhammad(P.B.U.H) who came to this world with the last of the Revealed Books,the Holy Qur'an.There is the verse in the Holy Qur'an saying:

                             "We have Indeed revealed to you the book with the truth,
                             so that you may judge between mankind.(4:105).

This Revealed book the Qur'an ,will tell you what is true and what is false,what is right and what is wrong ,what is good and what is bad-things which you cannot know from your Intellect.