This is always the most difficult issue for Non-Muslims grasping Islam. They don't yet realize what Islam is. Islam is not just a religion, from Muslim perspective, it is the divine law. God created the universe with Islam, the scientific, mathematical, social, and spiritual, along with the material realms, are all governed by the laws of Islam. Just as humans cannot surpass gravity on Earth, so to is it impossible to surpass Islam. Merely being subject to the laws of God (Islam), makes everyone Muslim, whether they accept it or not. However, Allah swt further defines it that only those who willingly embrace God as Muslims, shall receive His reward in this life and the next, whereas the rest of the people (those who reject God, yet are inevitably governed by His laws regardless) will only enjoy the rewards from God in this life. Islam exists regardless and independent of whether humans, animals, plants, or the Earth exist. It is ultimate truth.
Im sorry but doesnt the space shuttle defy gravity?