The logical pathway to monotheism (tawhid)

فَلَمَّا جَنَّ عَلَيْهِ ٱلَّيْلُ رَءَا كَوْكَبًا ۖ قَالَ هَـٰذَا رَبِّى ۖ فَلَمَّآ أَفَلَ قَالَ لَآ أُحِبُّ ٱلْـَٔافِلِينَ

So when the night covered him [with darkness], he saw a star. He said, "This is my lord." But when it set, he said, "I like not those that set [i.e., disappear]."