"Soon shall We show them Our signs in the universe and in their own souls, until it becomes clear to them that this is indeed the truth. Is it not enough that your Lord is a witness over everything?" [41.53 Al-Quran]
"The seven heavens, the earth and all beings therein declare His glory. There is not a single thing but glorifies Him with His praise, but you do not understand their hymns of His glory. The fact is that He is very Forbearing, Forgiving."