Islam in English means submission. Before the last revelation of God to humans (Islam) there were many prophets and many religions. Those who submitted to God's absolute authority and followed his commandments at any age are Muslims (submitted). The First Commandment is the most important in all the scriptures:
Hear, O Israel! The Lord our God is One God!Therefore you shall adore the Lord your God with all your heart,with all your soul,with all your mind,and with all your strength.[Deuteronomy 6:4-5, Mark 12:29 and Luke 10:27, Quran 3:18]. Thus one has to have faith in the glorious, omnipotent and omnipresent God. To prove your faith (Hadith: faith is what is in depth of the heart and proved by actions) you have to follow God commandments. No one is prefect except God. Messengers are close to perfect as humans, then Saints and then good people. I hope I belong to the last group. Humans are in a continuous struggle between the good and evil. Satan is competing every second with God over the hearts and minds of humans. Conscience is built up by the inner judgment of human of what is right and what is wrong. Satan wants us to do follow our senses: pleasure and pain with no regard to what is right and what is wrong. Conscience is perfected when humans receive a perfect message from God as in the purist of the three major religions before people corrupted or misinterpreted them. Unlike some Christians who believe that they are saved by the cross or blood of Christ Muslims believe of teachings of Christ (PBUH) which is almost the same as Muhammad (PBUH) as the savior. The thing I do not understand how Christians reconcile being saved by the cross and in the same time they believe in God's wrath. I do not know how they can have it both ways. Everyone has the right to his creed, but as humans we all will be asked to be righteous and cooperate to fill the earth with justice and fairness. We will be asked if we had spread God's teachings that the prophets told us in earth. If you are saved already then you may as well forget God's wrath. Some Muslims in my country are trying to deceive God saying that they will do the evil and go to pilgrims in Mecca every year and they will be O.K. This is how Satan tempted people so he can corrupt the world. Though there is no obligation to creed, Islam is the last message and it deserves or actually ought to be studied. If one stands to refute it he is better to have very strong arguments so when he meets God he will be convincing. If you believe or crossed your mind that no life after death you have to examine it very well now since there is no second chance after we die. Life in earth is only transient and a preparation to our eternal life in heaven or hell so this is a duty to yourself. Actually by default we are entitled to eternal heaven, if you do the good and sustain few years of sufferings. You can navigate my web as well many in internet as www.submission.org who proves God existence and compare religions.