The Day when We will fold the heaven like the folding of a [written] sheet for the records. As We began the first creation, We will repeat it. [That is] a promise binding upon Us. Indeed, We will do it.
Qur’an [21:104] Surat Al-‘Anbyā’ (The Prophets) (The Big Crunch in the Qur’an)
A headache is felt by an individual, it is pain, it exists, it cannot be seen, has no color or odor yet most certainly exist at all times. The same can be said for air. Air is omnipresent, it too is invisible and odorless… We should use examples in nature to try and think rationally. If you don’t have a proper understanding of who God is, then how can you say he doesn’t exist?