Some people have said that…

Some people have said that Allah sending Messengers to us would be frivolous, since all that they come with agrees with the mind. We say in response, it does agree with the mind and Prophets and Messengers (Alayhim as-Salaam) do indeed teach very important skills for this life (like writing, chain-mail armor, etc.); but they also inform us of the Ghayb (the Unseen), which we could never have stumbled upon by ourselves no matter how much we endeavored through rationality-only. At most we can establish the possibility of many of these points of belief, but not their absolute reality/occurrence.