Brief Verse Interpretation / Tafsir
Allah can and does reveal His signs in nature and in humans to show that Quran and its message is the ultimate Truth. And the fact that Allah is the Witness over all things (and His declaration of this fact) should be sufficient proof by itself.
“We will show them Our signs in the horizons and within themselves until it becomes clear to them that it is the truth. But is it not sufficient concerning your Lord that He is, over all things, a Witness?” Quran (Surah Fussilat, 53)